Son compartido

“Am I the asshole for exposing my brother for cheating on his girlfriend of 8 years?” So I (17F) live with my older brother (21M). He’s always been the “perfect son.” Good uni, nice job, everyone loves him. He’s been dating his girlfriend (20F) for 3 years. She’s literally the sweetest person ever. Like, she brings my mum flowers, remembers everyone’s birthdays… she even helped me study for exams. I always thought he didn’t deserve her, but I kept that to myself. Until last weekend.