Waking up in my van I had relived every moment last week when me and Casey had sex in the car. It was liked a new man had taken over my body. I felt sick with myself and I knew he did too.

Ever since that day we had avoided talking to each other unless we had to. Spending my spare time with Hannah to prove I wanted her, but a part of me knew I didn't as much as I had. I mean I still did, just not enough.

Seeing Casey walking around with Denny after they had got together gave me the lift I needed to think this would never happen again. We were both taken and both happy with who we were with.

Going to work, I wasn't working with him today. I gave a couple of people some work out tips while I unloaded some stock. Only later did I realize I hadn't seen Heath who was supposed to be working. The office shutters were down. I hadn't realized until I came out of the locker room that he must have come in. Going in these if he was OK I opened the door.

What I saw was something that shocked me. Casey was sat on the desk as Denny was touching him on his pants. Only when she pulled back all embarrassed did I realize what she was doing. Making her excuses, she walked out while Casey straightened up. He mentioned he was here to order some emergency stock he had forgotten about the day before.

Casey was all red. As he turned is back to me I saw he was turned on by what Denny had done and failed to finish. Turning around and groaning, rubbing his face, he refused to look at me. He went over to the door and faced me. We were inches apart and he beckoned me to leave, still uncomfortable. I had a feeling he was going to finish himself off as I could tell it bothered him. I kind of got the impression it was now because of me.

Placing my hand on the door, I closed it the same second I kissed him. Pushing him against the wall, I grabbed his face and crushed my lips harder against his and rubbed myself over him. Getting the satisfaction that he was more turned on than before I used my knee to open his legs and ran it up between his legs. He grabbed my waist and held me tighter to him.

Running my hand down his top and in his pants, I gripped him hard and stroked him. I sucked his tongue and closed any gaps in our mouths to drown out his moans. I stroked him slow at first then faster and faster until knew he was about the come then I slowed down. He thrust into me out of frustration, bit his lip until he came.

As he zipped cleaned up I left the office and hid my satisfaction in front of the gym members. I knew I would regret that but for now I was glad I had done it. A big part of me hoped I had turned him on more than his girlfriend. Seeing her do what she had to him hadn't bothered me but being able to finish off was better. He was mine. For whenever I let go of my urges.