My stepsister caught me masturbating on her panties and offered to help me

I saw my stepsister's worn leopard print panties and my dick immediately got hard, then I decided to jerk off to them. But my stepsister saw this and decided to help me, she offered to push her panties aside and put my dick in her tight pussy and I came inside her. The next day she didn't calm down and we fucked again, she banged her juicy tits against my face while jumping on my dick.