Sincerely Yours: The Cartier Cartel 5

by Jessica N. Watkins

I let Tempo go the moment I realized her heart belonged somewhere else, because no matter how much I cared, I was never going to hold on to a woman who wanted another man. It wasn’t the loss that unraveled me so much as what it said about my judgment. For the first time, I had to question how a man as calculated, polished, and disciplined as me could misread love so badly. So I did what I knew best. I buried myself in business, legacy, and control, convincing myself that love was just another distraction I could live without until one unexpected woman stepped into my life and challenged everything I thought I knew. She wasn’t looking to be saved, and I wasn’t looking to fall, but the more our worlds collided, the harder it became to ignore the pull between us. What starts as an unexpected chemistry becomes something deeper and more healing than I ever saw coming.

407 pages, Kindle Edition

Published March 13, 2026

About the author

Author of Urban Chick Lit, Erotica, and Contemporary Urban Fiction... Jessica N. Watkins was born April 1st in Chicago, Illinois. She obtained a Bachelors of Arts with Focus in Psychology from DePaul University and Masters of Applied Professional Studies with focus in Business Administration from the like institution. Working in Hospital Administration for the majority of her career, Watkins has also been an author of fiction literature since the young age of nine. Eventually she used writing as an outlet during her freshmen year of high school as a single parent: “In the third grade I entered a short story contest with a fiction tale of an apple tree that refused to grow despite the efforts of the darling main character. My writing evolved from apple trees to my seventh and eighth grade classmates paying me to read novels I had written about kids our age living the lives our parents wouldn’t dare let us”. At the age of twenty-eight, Watkins’ chronicles have matured into steamy, humorous, and realistic tales of women's literature. She hopes that The Epitome of Femistry series will successfully emulate ideal femininity while tackling stereotypes, familiar heartache, and relatable distress in a humorous, sophisticated, and erotic fashion.

Jessica N. Watkins is available for talks, workshops or book signings. Email her for more information at Jessica@femistrypress.net.

Additional information can be found at www.jessica-n-watkins.com.

Follow Jessica on Twitter - @authorjwatkins.

Follow Jessica on Facebook- http://www.facebook.com/authorjwatkins

Reviews

[Readingizmytherapy · Rating 4 out of 5]

Bravo!

I loved this series from the beginning. Ms. Watkins has a way of writing these intentional men that you just can’t be ignored. The MMC is always someone who is sure of who he is and what he wants, standing in business each time and I. Sincere’s story she did not disappoint. I enjoyed how she made love the focus of his story while showing his strength and loyalty in a the Cartier world. She also introduced some folk who I’m sure is going to shake the table and I can’t wait. With each book she solidifies my love for interconnected standalone stories!

[Eunice · Rating 5 out of 5]

Sincere

Yessss Jessica!!

Yesss Sincere he coming behind his checking whoever gotta problem in the most gentleman like way! Glad he found who he found and it’s genuine no games. Sis was wrong doeeeee and when you read it you’ll know why. Omission is lying ma’am

Reek doeee 👀👀👀🫣

Saint 🍻🥂 my dawg!!!

Legend still my boo doe! Bc why my brand new baby out this door!!!!

Not much of Icon but vital when he was around. Happy his wife ain’t working his nerves yet bc she shollll working mines.

Welcome to the fam Sincere !

[Tarro Stokes-Funches · Rating 5 out of 5]

Unmatched pen game!!
Jessica A. Watkins, pen game is unmatched! Sis, you wrote the heck out of Sincere and Rhythm was just spectacular. Her ex was crazy as all get out and got just what he deserved. I am really not liking Reek too much. Yes, he told Ava he didn't want a relationship, but yet you slept with her knowing how she felt about him. Now, that Sienna is going to get some ish started and folks are going to come out of retirement!

I really enjoyed this book!! Ready for Ava and Reek's story!

[Patti J Lanfair · Rating 5 out of 5]

Family, friends, and nore

Do you know what i thought about when I was almost finished with this book? Suncere mama! Did i miss a part where she apologized to rhythm because if not what was the purpose of her being in the story. Rhythm single mom with a baby daddy who hustles and the little he does he thinks he should get king treatment because they been together so long but they she meets aria who believes in her are and then sincere who treats her like a queen and in between it all you got action, love, relationships and more

[TRACY W. · Rating 5 out of 5]

Loved it!

Sincere is book husband! That man deserves the love Rhyhm gives him after what he went through. He had so much love to give and the right person was placed in his life at the right time. That darn Saint is too much but funny at the same time. Poor Reek! Sienna is dirty but her and her daddy playing with the wrong people. Ava is going to get her love. I waited patiently for Sincere story and it was everything I knew it wouldn't be.

[Angela Ridle · Rating 5 out of 5]

Sincere is BAE!!

I’m almost certain that Sincere’s book might be my favorite thus far! Sincere and Rhythm had me swooning throughout the entire story. From start to finish you get a clear visual of the love between the two. The growth of the rest of the group is significantly noticeable too. There were several instances that had me tearing up at the way the love between all of the main characters was so pure.

[Shei Polk · Rating 5 out of 5]

Sincere😍

Sincere is a man that knows who he is and that in itself is the biggest turn on.

Just because he was affiliated with killer he never felt the need to fit in or act outside of his character to prove a point.

Tempo broke him at least he thought but Tempo existed so he was ready for his true love.

I have been locked in since the Cartier cartel started and can’t wait for the next book.

[Charlotte Bembry · Rating 5 out of 5]

Absolutely loved it!

In this well written story, Jessica introduced us to the relationship between Sincere and Rhythm. He loved her out loud and protected her from any and everything. I’m glad that he didn’t allow his past relationship to ruin him. I’m loving this Cartier gang and can’t wait to see what happens between Reek, Ava and Sienna. I can’t wait for Sienna to get busted as well.

[Troynika Wright · Rating 5 out of 5]

I love him!

I already had so much respect for Sincere because of how he handled Tempo and Big A. That man is now my favorite! I love him real bad. The love match was perfect! True definition of when you know, you know. The Ava plot twist? Chef's kiss. Looking forward to reading her side of the story. Great book!

[Synthia Littleton · Rating 5 out of 5]

This one is my favorite in the series

Sincere is my new honey. I just love the quiet strength. He deserved Rhythm, and she deserved the goodness, stability, and worship that was his love. I love it when the love part of a couple is easy. This was an easy read. Insta love....... This was a good read.

[Jaleisa · Rating 5 out of 5]

The 5th installment to the Cartier Cartel Was EVERYTHING!!! If you’ve been following trust me when I say Sincere is going to blow you away. Jessica did her thing with his character development. I’m fanning myself still thinking about Sincere. You will not be disappointed. That ending already has me impatient for the next book. I will defined be circling back for a reread very soon!

[Thujuana · Rating 5 out of 5]

Jessica N Watkins is the GOAT!!!

I loved everything about this book. Jessica N Watkins is a master storyteller! The emotion she pulls out of the reader. The way she makes the characters feel so real. This book has drama, love, humor and plenty of spice. I cannot wait to read Ava and Reek’s story. I highly recommend this book and all the other books in her catalog.

[Judith Sims · Rating 5 out of 5]

Sincere!!!

What an amazing man to have falling in love with you!!! I didn't even remember Big A & Tempo getting married, but I remember him being hurt and letting her go!!! Then he finds that love with an unknown and lifted her to star status!!! Ava and Reek are next, can't wait to see how that one turns out!!!

[Benita Cleaves · Rating 4 out of 5]

Sincere's Rhythm

Sincere, calm cool and collected, with a good heart. Loved the flow of the story and plot. One thing that annoys me is why the author chooses to prolong Icon and Liv' s pain. They are UBERNAIRES!! Why not hire a surrogate or several. I roll my eyes every time their missy comes up...ugh. Anyway ready for Reek and Ava.

[Natalie · Rating 5 out of 5]

Truly Sincere 💕🤞🏽❤️‍🔥

Sincere played chess not checkers. Even after having is heart broken 💔 the wall came down for Rhythm. Love how Rhythm was about her business and kids. Glad she was able to recognize a real man and get rid Kodi. Sincere truly earned his spot with the Cartier❤️‍🔥🥳❤️‍🔥🥰

[Shanetta Smith · Rating 5 out of 5]

Loving this series

I love that she continued to pull me in and at the same time wanting to slap the characters and their decisions. BUT THAT'S GOOD WRITING AND SHINING A LIGHT ON SINGLE MOTHERS trying to move forward and be a good mom.
👏🏾👏🏾👏🏾👏🏾

[claudrina · Rating 5 out of 5]

Sincere

So happy that Sin found his one. Rhythm’s kid father was something else and I’m glad he was dealt with. Now when Reek find out about Sienna it’s gonna be a hot good mess…and when he see Ava. Yes I’m waiting in the next book.

Also the man on the cover is extra FINE !!!!!!

[Wanda Batiste · Rating 4 out of 5]

juicy.

Slow to action. Lots of talk. Reads like similar. Add some humor. Too much focus on sex scene. Tell story and try not to make us so weak then strong and weak again. We are not that indecisive. Gonna stick with author anyways.

[Kathy Jamerson · Rating 5 out of 5]

I'm invested!

Man! This is getting crazy. I have so many questions that need answers. So please write to explain and clear up issues no matter how many pages it takes. Don't short-cut the outcomes.

[Toni Reynolds · Rating 5 out of 5]

Can’t wait until the next book 😆 I loved it. ❤️

[Syretta Hines Adams · Rating 5 out of 5]

Come in Jessica!!
Sincere and Rythem were perfect. Now I can't wait for Ava and Reek....

[Shahtia Gay-hairston · Rating 5 out of 5]

Sincere

I am glad to read Sincere’s story and witness the love between him and Rhythm. I love how he was intentional about pursuing her. Ava, Sienna, and Reek
have me on edge!

[Larowland Riley · Rating 5 out of 5]

sincerely yours

Great read amazing work of literature My Guy finally found his forever ! I can’t wait for Ava and Reek

[GREEDY · Rating 4 out of 5]

This series was a fantastic read, and I highly recommend it! 🤩 #series #read #recommendation

🌶🌶🌶🌶🌶
⭐️⭐️⭐️⭐️

[Pamela session · Rating 5 out of 5]

🥰🥰😍😍

First time reading from this author simply amazing loved it from beginning to end yessss it had my attention I was shouting and happy for the couple I loved it !!!!!💞💞💞🙌🏾🙌🏾🙌🏾

[Quay Solomon · Rating 5 out of 5]

Sincere was definitely that dude...I loved how he loved and protected Rhythm...Sienna is definitely going to be a problem with her deceitful self

[Anyae Outlaw · Rating 5 out of 5]

So good!!!! OMG! I can’t wait to read the next book !!! This entire series has been a treat .

[Jon'Tair Curry-Brown Jr · Rating 5 out of 5]

happy for sincere kinda sad for Ava

My girl Ava just seems like she can’t catch a break first her weird father and now she’s with child by play boy Reek this is gonna get messsssyyy

[Ang · Rating 5 out of 5]

Surprised

This one shocked me. I was sure Sincere and Ava were the next couple. I didn't even factor Reek in. I like Sincere and Autumn. After everything she deserves some happy.

[Sunshynsweet · Rating 5 out of 5]

This series got me in eggshells. Come on Jessica can’t wait to read the next book.