Creampie my stepsister after accidentally seeing her nudes

My stepsister is terrible with technology, she is always asking me to help her with one thing or another. I have never minded helping her, even when she is barging into my room and waking me up but today I got a bonus. My eyes widened as I spotted all of her nudes, eventually she realised what I had seen. God it made me hard, she is hairy! I love hairy milfs. We only meant to tease, I rubbed my cock along her knickers feeling her getting wetter through the cloth. Before long I just couldn't hold back, I had to slide it into her soaking tight pussy. She wanted it too despite being scared of mother walking in. So long as I didn't cum inside her she said. I couldn't help it, of course I left her with a Creampie.