Mistreated daughter/sister

This is what I remember, the h had two other sisters and she was the middle child who didn't get along with her oldest sister and mother was openly hostile towards her, she lives alone and meets her neighbor and they hook up, she gets pregnant (not by him) and they move in together...... I believe her younger sister is seeing the h ex boyfriend.....

I believe I read this book between 2012 - 2015 and it's not Elise Alden's Hate To Love you but it's very similar to that book