I walk past my stepmom's room and I catch her admiring herself in the mirror. To my surprise she starts undressing. She looked so sexy in her evening gown but what was underneath is what really got my attention. She had on a white slip and girdle along with her big white bra. I couldn't help but stand by the door and watch. Then she started to lotion herself up. That's when I lost it. I took my dick out and started stroking. I believe she knew I was there. She looked my way a few times. Then she comes to the door and pretends to catch me. But I knew all along she enjoyed me stroking my young dick to her.