J’ai baisé ma demi-sœur excitée après l’avoir attrapée en train de se masturber, cheval renversé

I looked into my stepsister's room and saw her touching her pussy and then reaching orgasm using a big vibrator. I approached her and she didn't mind, she started massaging my cock and then I fucked her, filling her hairy pussy with cum in a reverse cowgirl position.