Stepsister let her brother's shaft into her hairy pussy

Pillow fights with my stepsister are an almost daily activity that we have fun with. But today, during the battle, Chanel Camryn suddenly pulls off my panties and takes the protruding penis into her mouth, beginning to actively suck it. Of course, I enjoy all this very much, especially when the beauty then climbs onto my dick and starts jumping on it. Well, after such foreplay, I definitely can’t stand aside while I bug my sister, who gets a sweet cum from this. But I wonder - who taught her this?