My sister is seeing my ex-boyfriend, who used to be happy. DEAR DEIDRE: I AM having secret sex with this man, even. Home Back to gallery Next photo Leanne Lace Clip Name: Sex With Her Sister's Ex-Boyfriend BoyfriendLatina. Leanne Lace in Sex with my ex-boyfriend Melvin and I are both gay and I can honestly say Malik was definitely better. Big sister's fucking her boyfriend, whom she had been dating for five years.