I satisfy my stepsister's desires and show her I'm not gay, culminating in a passionate climax on her buttocks

I\'m a young Indian dude, best friends with my step-sis. She\'s shy and I\'ve never seen her tits. I\'m sick of being called gay, so I decide to show her I\'m straight. I fuck her hard, but she\'s too shy. I cum on her ass, but she freaks out.