Fight

I was angry. Angry with my wife, angry with this stranger, and angry with the world as a whole. I'd just got this amazing power to be invisible and what had happened? I'd found my wife was a cheating slut, that's what.

I had to stop this guy from going any further, I couldn't let him fuck my wife. Not once I knew about it at least. I was about to attack him when I realised that'd give away my secret for sure, and while I wanted to beat him senseless I still wanted to be able to keep my ability secret. A simple plan formed in my mind. It did rely a little on my wife not realising what was happening, but that probably wouldn't be an issue. She was writhing on the floor from pleasure so most likely wouldn't really notice what I was about to do.

I gently grasped her ankle and lined it up with the jerk's face, then with my right hand shoved her knee backwards as hard as I could. Her heel hit him square between the eyes, shattering his nose and sending his head flying back. He struggled to his feet as my wife realised she'd 'accidently' kicked him as she orgasmed and tried to stand and help him. Too late he fell backwards, knocking his head on the corner of the bookshelf by the door, and crumpled limply to a sad pile, bleeding, lying limp on our wooden floor.

I'd meant to hurt him sure, but it was apparent as my wife rushed over to him and held his limp form that I'd done a bit more damage than I planned. He was clearly dead. DEAD. On my lounge room floor. My wife's lover, dead. Unless she confessed to the police I was certainly going to be the prime suspect. What could I do? I was still invisible so the cops would obviously never find me if I chose to run, but I had no idea if my invisibility was permanent or not and it certainly wouldn't do to hide, then lose my invisibility after they'd decided I was guilty.