Caught

This is how I got caught masturbating and lost my virginity to my stepmom.
I was still in High School but had just turned eighteen, and was still living with my dad and stepmom, Beverly. I was ashy kind in school and did not get many dates, this lead to lots of jacking off. I did not realize it at the time but not only had my dad married a transsexual, but Beverly liked to sleep around. I later found out my dad, liked it and enjoy hearing her tell about a how she seduced strait guys.
So I was watching some porn on the internet when Beverly walked in on me. I quickly changed windows and made it look like I was doing my homework when one of those annoying popup windows came up. This would have been embarrassing as is but it was for a transsexual chat page. She was standing right over me when it popup and when I closed it, the page went to the porn I was watching. It was of this MILF getting fucked by a guy in his twenties.
I quickly tried to close this page as well but the damage had been done. I was caught red handed. She gasped and then began to scold me. “What would your father say if he walked in on you doing this!” she said. I stammered but didn’t get anything out before she interrupted me. “That’s disgusting and I should tell your father,” she threatened.
I pleaded with not to but she was insistent, and annoyingly she remained in the room to observe me finish my homework. I could not concentrate, and I still had a giant hard on that would not go away. Just when I could get a moment to think she asked, “are you still a virgin?” I said I was and she scolded me that I would never get a girl doing that, and insisted I finish my homework. This type of conversation continued for several more minutes. Her asking what I like in porn, girls, my fantasies and then scolding me for have such thoughts.

Finally I had enough and turned around to ask her to be quiet or leave me alone, when I saw her rubbing her breasts and the front of her panties.