Over the next two weeks Mark and I fucked four more times. We had free reign of the house while Courtney was at work and I strategically had sex in any place I felt was vindictive and would hurt Courtney if she found out.
He fucked me missionary on the couch right where she typically sat or laid her head. We did the same upstairs in the spare bedroom, before finishing doggy's style. I told Mark I'd change the sheets before the next time June visited but I had absolutely no intention to follow through. We fucked twice In Courtney's bed at my insistence. The first time I assumed all control, riding him forward and backwards for what seemed like an hour before making him cum. The second session in her bed was shorter but much more intense. It was hard, hair pulling sex in just about every position possible - one position rapidly transitioning to another before he finished inside me with his hand around my throat.
When Courtney or Derek were around we acted normal. We didn't talk often before and we hadn't changed that now. If I heard Courtney and Mark having sex I would wake Derek up and make him fuck me, making sure to moan loud enough that Mark would hear.
*****
The knock on the door was loud and I galloped downstairs to answer it. Derek had text messaged me saying he was coming over. Courtney and Mark were both at work so we would have the place to ourselves. I was excited at the prospects.
When I opened the door Derek stood there with tears in his eyes. My heart dropped.
"What's wrong?" I asked hesitantly, not sure I wanted to hear the answer.
"Can we go upstairs and talk?" Derek asked.
We walked upstairs to my room and sat on the bed.
"I know you fucked Mark. I heard it at work. At work Kelly!"
I had been caught.
"That's not true!" I lied.
"Don't lie to me Kelly! I heard him taking to someone about it in the locker room. They didn't know I was there. How could you do this?"
I started to cry myself. Derek was a great guy and I had hurt him...bad. He deserved better then this. He deserved better than me.
"How many times did you fuck him? Just once?"
I froze.