I was optimistic and excited for this story, but unfortunately, the writing wasn't up to my standards, so I'm going to make an honest review about the writing style.
The story concept was good. It was just the execution that was disappointing.
Every time her dad was mentioned, there would be paragraphs explaining and repeating their whole relationship, which also included contradictions. Like "he was a great father but he was always disappointed, and put me in charge, and was never around, and had high expectations, and I was the one responsible for my sister . . . But he was a great father. " And having that contradiction once was bad, but having it repeated over and over again, in between dialogue when she's even just thinking about her dad, well, that was just getting very difficult to read.
I found myself constantly skimming the internal monologues and description paragraphs, just looking for the dialogue. Which was also sparse. Lots of the exposition could have been revealed through character interactions, but I noticed a lot of inconsistencies with the fmc thinking about something during conversation, and then later the pack knowing it or mentioning it like they talked about that detail, when going back to read it again, it was never written that she talked about it.
I'm not saying the author is bad, I quite liked where the story was going, the spicy scenes were good, and each character had a distinct personality. I definitely think they could have used 1 or 2 more revisions from an editor. When the personal opinions of the fmc were written out over and over again, everytime her sister was mentioned, it felt like a fast read exposition dump, that usually only happens at the very beginning of a story. But the dump was repeating every other chapter.
Also, I might not read part 2, but in case I do later, I'm putting my theory down here, I think the ex-boyfriend took her sister.