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Sin

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Releasing November 21, my first MMF erotica between twins Raven and Raya and their stepfather, Cassius



As an erotica this spicy Christmas story will have a lot of smut and little plot



Blurb coming soon!



What to Expect



12 year age gap

Christmas lingerie

Spanking

Nipple clamps

Daddy kink

Edging

Orgasm control

Double Penetration



CW: Cheating, sort of (the stepfather sleeps with the twins while he's married to their mom but he's left her and made it clear he wants a divorce)

ebook

Published November 21, 2025

23 people want to read

About the author

Felicity Snow

15 books206 followers

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5 stars
5 (20%)
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16 (66%)
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Displaying 1 - 20 of 20 reviews
Profile Image for ⭐Toonasa⭐ •Romance Book Lovers' Haven•.
1,595 reviews299 followers
December 11, 2025
4.5 Stars ⭐
A MMF taboo erotica which celebrates the holidays in a sinful way. It's got Twins(-cest) + Stepdaddy, age gap (~12yrs), kinks & close proximity in a cabin!
It's my 1st book by Felicity & it's her 1st foray from MM to MMF stories. It's hot yet cute, read my #ARC in 4hrs. Quite a lovely world where STDs don't exist 🙌. I think it's my 1st book with MF twins in 'cest.

Cassius (33) is a lit professor, C's sweet, gentle & wants to be loved & belong 🥺. His wife cheating hurt & humiliated (I'd've loved to see that resolve!), but more so he's resigned, to spend Christmas alone in his cabin. But then finds her twins there!

Raven is the caretaker, thoughtful, dominating older-brother with a filthy mouth. Raya is the "quieter", younger-sister with a bubbly, vibrant personality with a pain kink. We're told Ray's introverted but honestly with how Rav's portrayed, he's way more cautious than her 🤔 (My handcanon- he gets introspective, or it'll be error 🤷‍♀️). R+R are juniors in college!

This starts as a dirty fantasy OMG. I've never read a taboo book where they get into it on Ch2, throwing angst to wind 😂 (I like having *some* build-up tho, sadly 😬). Being so chill, we get HOT sexy times from the start. There's Daddy kink, praise, bondage, spanking, edging, lingerie 🥵, even some roleplay.

Gladly, I did get my talks, bonding over parental hurts 🥹 & sweet, cuteness later 🥰. Better late than never 😅. Oh worries, what'll happen after holidays are over? But dang, this is the epitome of low angst as even the feelings talk goes easy 😁. Loved the growth of trust & snowy fun! We only get C's pov, I like getting all MCs POVs, but it did work here. I'm glad we get an epilogue!

Story Ratings:
POV: 1st person, Single POV
1) Enjoyed? —> Yes! Very hot, cute too.
2) The Characters: 4.5/5
3) Top feels: 🥺😅🥵😳😆😉😍😜🥵🥰🥵🙁😏😁😍
4) Steamy scenes: 5/5
5) Levels: Cute+Swoon: 4/5
Angst: 1/5
Dark: 1/5
6) Creativity + world: 4/5
7) Plot arc: (Short—taboo, Smutty, Cute) 3.5/5
8) Writing style + pace: 4.5/5

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Profile Image for Denise .
61 reviews22 followers
November 16, 2025
if you're looking for a quick, spicy, holiday read, then this is for you! I enjoyed it for what it was. A super spicy taboo read. Sometimes we need a book with mostly smut and very little plot! 😏
Profile Image for The Naughty Booknook.
178 reviews73 followers
November 27, 2025
OK, I'm gonna start out with my usual. This is a taboo book. If that's not your thing, that's perfectly. Okay, it's not everybody's cup of tea, but if it is not your thing, please do not read it and then give it a bad review because it was a taboo book. It isn't fair to the author, and it's not fair to other readers.

This is Felicity Snows' first MMF, and it's exactly what you would expect in a erotica novella spice hot enough to melt the snow. It was a fun steamy read that will be a fun one to add to your Christmas TBR.

Definitely will be curious to see if there will be more MMF from Felicity Snow 🩷
Profile Image for Jennivie.
Author 6 books37 followers
January 8, 2026
This is the author’s first MMF release. Sin is a quick, fun, festive, taboo MMF romp with twins in an established relationship, inviting in their just barely former stepdad. This book is light on plot and super heavy on spice, just as the author intended and promoted. Cassius’s marriage is over, and he goes to the cabin for Christmas to be alone, only he isn’t alone; his twin step-children are already there, banging in the holiday season, together. He finds himself watching instead of turning away, and to his surprise, they want him to see... everything, and for him to join in on the naughty, holiday fun.

I enjoyed this novella more than I expected. I chose to read it, to expand my reading a little bit out of my usual comfort zone, and it definitely did that very well. I have loved several books by this author in the past, and I'm looking forward to reading whatever comes next.

Profile Image for Moon.
199 reviews2 followers
dnf-did-not-finish
November 15, 2025
I received this as an ARC read

I struggled with the decision whether to dnf or not. I told myself I would dnf it if it were longer, but ultimately decided to do it anyway. I read about 53% and it just wasn't for me.
I love spice and taboo, but I also love character depth and growth, meaningful conversation and context. This felt like the script for a porn movie, which made me really sad. I didn't get the chance to connect with the characters, because they felt shallow.

I'm sure some smut readers will absolutely love this, but I just didn't feel it.
Profile Image for Cassandra.
139 reviews8 followers
November 23, 2025
*ARC REVIEW*

"I can't decide what I like more - how godd*mn sexy you look when you come or how f*cking adorable you are when you blush."

This was a short and spicy novella that will have you melting by the fire place! Cassius, Raven, and Raya know what they want and take it! It is definitely more spice than plot, but I'm here for it. Sometimes you just need that to break up the monotony of all the other books. I absolutely enjoy reading anything by Felicity. It doesn’t matter if it's a short story or a full novel, she always delivers!
Profile Image for Beatriz Gil.
Author 1 book14 followers
November 21, 2025
I finished Sin yesterday, and although I went into it curious and hopeful, it ultimately wasn’t the right fit for me.

The premise has genuinely strong potential: a complicated stepfamily dynamic, a forbidden emotional landscape, isolation, and characters with shared history. There is a fertile ground here for a deeply emotional dark romance.
But I felt like those seeds never fully developed.

The connection between the characters didn’t feel entirely earned - we move very quickly into the physical side of the relationship without enough time spent building emotional tension, internal conflict, or intimacy. And as a reader, that made it difficult for me to invest in them or to believe their motivations.

The spice itself is intense and well written - and I know many readers will pick up this novella exactly for that and enjoy it. But personally, I need a stronger emotional foundation to really feel the impact of explicit scenes. Without it, I found myself disconnecting and eventually skimming through the last part.

I also struggled with a few inconsistencies in character behaviour and plot progression, which occasionally pulled me out of the story. Nothing dramatic - just enough to leave me wishing for more depth, more quiet emotional moments, more time with them as whole people rather than just physical impulses.

Overall, I think this is a story with a promising concept that would truly shine with a bit more emotional development before diving into the intense erotic elements.

Would I recommend it?

Yes - to readers looking for a fast-paced novella focused mainly on spice, without the need for heavy character building or slow-burn tension.
For readers who crave psychological depth, emotional stakes, and a strong relational arc - it may not deliver what you’re looking for.
Profile Image for Zoë Miranda.
616 reviews10 followers
December 29, 2025
Holiday Cheer Meter: 2/5
(Where 1 is as Christmassy as 'Die Hard' and 5 is more like 'Elf')

1st person, present tense, single PoV (Cassius)
Cassius Blackwell (33), college professor
Raven (21), college junior
Raya (21), college junior

When the blurb is basically a kink list and what's promised is a spicy Christmas story with a lot of smut and little plot this is what you get. This was a quick, easy read. The listed kinks are all things I enjoy reading so I liked the story for what it was. With very little fanfare these three find themselves ensconced in a romantic cozy little cabin in the woods and the fun began.

If I'm honest the taboo nature of the relationships (twin sibs and stepfather) is such a non-issue within the story I don't even see the need/point in going there. I'm not fussed either way, it's a little titillating, but it seems like it should be a bigger deal if you're going to bother with it at all.

My bigger quibble is the length/pacing - it's a little long for erotica, with the author trying to develop a romantic relationship after the fact, which felt rather forced. Starting out so strong in the bedroom without any previously shown or described tension leaves a lot of work to be done to believe in a long-term HEA.

I was given an ARC and voluntarily wrote an honest review.
Profile Image for Kristi.
444 reviews11 followers
November 28, 2025
I finished this book and messaged the author saying that I don't think I should have liked it as much as I did. What does that say about me? (ha). This book was full of fun, festive and f***ing.

*This book is taboo. It's taboo. It's taboo.*

It's also fantastic. Cassius's marriage is over. Headed into the Christmas holiday, he decides to spend the two weeks at his cabin in a remote location. When Cass gets to the cabin, he realizes he's not alone. His soon to be ex-wife's adult twin children are there, knowing it's available to the family.

Continuing the surprise that there are other people there, he's shocked to discover that they are actively involved with one another and they want him to also be a part of them.

They spend the next two weeks really getting to know each other, in EVERY way. ;-) The love and affection as well as peace that they all bring one another is sweet and endearing. The time together is hawt.

I really enjoyed this book. It will not be for everyone but if you like boy/girl twincest and step Daddy love, you'll love this one.

Story: 4/5 ⭐⭐⭐⭐
Characters: 4/5 🫂🫂🫂🫂
Spice: 5/5 🍆🍆🍆🍆🍆
Taboo factor: 5/5 👏👏👏👏👏

I received a copy of this book as an ARC in exchange for my review. The thoughts on the book are my own.
54 reviews
November 23, 2025
Sin is the first MMF book from Felicity Snow, who is known an author of MM romances. If you're going into this book expecting her usual fare, you're likely to be a bit disappointed. Sin is Snow's least plot-driven and first true taboo book to date. I'd categorize it as "literary porn," which isn't a bad thing at all. The three MCs, given what little is revealed about them, are likable, and the many (many, many) sex scenes are hot and spicy. A book like this is, in my opinion, simply meant to entertain and tantalize the reader. Nothing more. I'd say it's successful in that regard. Kudos to Snow for trying something different. If she decides to release more books like this or books containing other different types of pairings, I'll gladly give them a try as well.

I received an advance review copy for free, and I am leaving this review voluntarily.
Profile Image for Jkirstyj.
93 reviews
November 27, 2025
Looking for a quick Spicy Taboo Holiday Read? You’ve found what you’re looking for here. This was hot spice is 🌶️🌶️🌶️🌶️🌶️. Cassius finds his wife sleeping with another man so leaves her and goes to his cabin to stay for Christmas where he finds two surprises are already there in the forms of his twin step kids Raven and Raya who all decide to stay at the cabin together. This book is hot from start to finish, the only Christmas spice you need! The edging & daddy kink yes please!! Felicity never disappoints taboo at its hottest and finest!
662 reviews3 followers
November 18, 2025
Damn!!!
MMF
Taboo -Twins/ Stepdad
age gap

if you are looking for plot there isn't much of one.. now if you are looking for a smoking hot 🔥 🥵 literally ALL THE SPICE with a dirty talking twin who knows how to put Step daddy and his twin sister in their place in the most panty dropping way.. then you really need to read this book! Like don't even think about it, just spend the next hour and get lost in this smutty taboo goodness! ❤️
Profile Image for A.W. Turner.
Author 20 books27 followers
December 6, 2025
"Sin," with snow. smut and Santa hats!

Twin-sibling seduction and step-daddy kink, what is not to like.

This fast-paced short story is dirty enough to bring a flush to your cheeks-without a spanking, unlike Raya who just loves to be punished for being naughty. I wish Felicity explored the plot a little more, but it didn't take away from my enjoyment, as its full of spice and festive sizzle hot enough to melt your snowman!

I'd recommend it to lovers of twincest/taboo, dominant/care giver, step-daddies and festive found family.
Profile Image for Avery.
482 reviews21 followers
November 19, 2025
A whole lot of smut and very little plot and to be honest, a perfect smutty story that you can read in one sitting. You don’t even need to do it beside the Christmas tree since you will be so engrossed that you won’t even notice it any way. This was all sorts of hot and I could have done with a lot more chapters of these three! Now if you don’t like taboo, please do not read this. Because it is, so be warned.

Raven and Raya didn’t even seduce their stepfather; they just made him jump in with both feet. I love how quickly this ramped up and stay full dial the entire time. If you’re in need of some awesome taboo smut, look no further!
Profile Image for Miruru Shouting.
1,045 reviews2 followers
November 21, 2025
Short smutty taboo MMF holilday novella, MF twincest, MF and MM pseudo-cest with stepfather

Oh man, I wish this could have been longer. The sneaking around and smut scenes were so hot. Because of the short length, don't expect more from the plot. If you go in expecting holiday smut, then you won't be disappointed.
Profile Image for Theresa L.
443 reviews4 followers
December 7, 2025
This is a true taboo story so please don't pick it up if it's not your thing. Its not everyone's cup of tea and that is ok.

What a great fast paced hot holiday taboo novella. Its exactly what i want in an Erotic Novella. No big plot points, little character depth and so much spice. I had a great time with this MMF dynamic. I liked that they all got equal play. I know this was the authors frist time with the dynamic and it worked. I hope to see more.

This story is written through they eyes of Cassius only. He is the stepfather to Raven and Raya who are twins. Raven and Raya took charge and drove the dynamic.
Profile Image for Kristin Altman.
6 reviews2 followers
December 4, 2025
MMF taboo romance.

I was a little nervous about this being single 1st person pov. However, I know Felicity is fantastic at writing emotions from other characters and feeling them without being in that pov.

It’s spicy. Sweet. Emotional. I loved every second of this naughty Christmas novella.
Profile Image for Ana Silva.
567 reviews9 followers
November 26, 2025
This was all kinds of hot. The twins were pure fire and boy did they take care of their “daddy”🥵🥵🥵

If you’re looking for something short and hot, this is it.
Profile Image for Kevin Mangold.
34 reviews
December 1, 2025
So erotic and taboo!!! Felicity Snow brought Cassius Raven and Raya together in a most beautiful and erotic display of love and happiness!!!!
Displaying 1 - 20 of 20 reviews

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