My stepsister's naked body made me pound her shaved pussy

I went into my stepsister's bedroom to borrow a pen. To my surprise, my stepsister was lying naked on her bed. Staring at my stepsister's naked body made me horny, so I started fingering my stepsister's pussy. Fingering my stepsister's pussy made me hornier, so I ended up fucking her shaved pussy with my cock.