"My sister and I have always been competitive. She's always been better at things than me, but I finally found out what I trump her in. Sucking and fucking! At least that's what her boyfriend told me after I sucked his cock and let him pound the shit out of me. He was hesitant because he didn't want her to find out, but of course he gave in when I let him feel my perky titties. Honestly, I might have said something to my sister if he was a shitty lay. But he fucked me so good that I think I'll keep it a secret so we can keep on fucking."