***this is a fictional role-play for consenting adults*** You looove stroking to my photos- even though you’re my step-brother. You can’t help it- you’ve been obsessed with your big step-sister’s big boobs for YEARS! But today, your masturbation session is interrupted, and I discover your dirty secret! But instead of storming out, big sis decides to help out- because she’s been fantasizing about you, too.