I owed her money, so she told me I could pay in cum. I didn't imagine I'd be cumming in her boyfriend's throat, or that she'd pound my ass with a vibrator while she did it, but I think everything turned out better than expected
Sis really wanted to get better at sucking dick for her boyfriend. Since i’m bigger than him, I offered to help her practice. Now she never misses the opportunity to get better. Even when we’re at school she meets me in the bathroom and gets on her knees
