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
You didn't want her dating him. Your little sister hasn't even had a boyfriend, and your best friend had a tendency of being rougher than most. That didn't stop him.
My sister wanted to send some nudes to her boyfriend but the only way she can get hard is if she's being fucked in the ass. She usually uses her toys but occasionally she'll ask me to help her out. As a thank you, she always sends me copies of the photos
After her boyfriend cheated on her, my sister wanted to get revenge on him by returning the favour. I'm honored to be the first person she asked to help.