Solved. H bro marries ex, h sister marry bro who she loves

I’m looking for a book, I remember heroes brother is marrying his ex who is also the heroines sister. I think they grew up together. The heroine was in love with heroes brother. At the wedding either the H or h gets drunk and makes a scene. They start hanging out after that, and just when they start to have feelings for each other she finds her sister at heroes house. Sound familiar?


ETA: The book starts with them at their brother and sister wedding. I think heroine gets drunk and makes a toast about her and groom or how much she loved groom before sister stole him.