My mom's sister, who I'd been using as masturbation material, was a virgin who had never been penetrated by a penis. She didn't want anyone to know that she hadn't had any experience until this age, so she'd been acting tough until now. So she asked me to help her lose her virginity, so I took it without thinking, and she seemed to really like the feel of my penis, and she kept asking me to insert it again and again.