Oh, gross. She's his sister. Run

Okay, he was turned on by his sister. Matt understood. Karen was pretty and smart. Plus her boobs were hanging naked just a few inches from his face. So of course he was turned on. That didn't mean he had to do anything about it.

"Listen, Karen. I don't know how to say this so I'll just say it. I'm getting turned on by being with you and that's sick. So I'm going to go into my bedroom and take care of myself and, well, you know, we'll be back to normal brother-sister stuff."

She looked at him, then pulled away from his hug and buttoned her blouse. "Sure, Matt. I didn't mean to get needy on you."

"No, it's not you it's me. I want to be here for you and trust me, I understand how hard it is to deal with all of the assholes and the patronizing bullshit and the jerks. I feel horrible that I'm running away when you need me but you don't need me to be one of those jerks, to be the kind of creep who looks at a woman and expects her to drop to her knees just because she notices him."

"Yeah, that would be gross."

"So, I'm out of here."

He turned and practically ran to the apartment.

When he got to his bedroom, he took out his dick and his phone and called up his favorite porn site.

The first four videos were "brother bangs step-sister" which he'd always found sexy, hell, he still found sexy, but sexy or not actually pursuing his sister in a romantic way was just not for him.

As he jerked off, his mind kept coming back to his sister's tits. Damn, she had a nice pair. If only he could just shoot his sperm all over... no, don't think that way Matt. Gross.