26 [M4A] Georgia Has this happened to anyone

Has anyone ever had the same experience? Aater my older bro and his older ex split up, her and I started to hook up, it was about 3 months after they split, they were engaged to get married but started arguing lots so split up. I started hooking up with my older brother's older EX fiancé about 3 months after they split. And now, it's been going on for years, and she is married now.