I'd been away on an out of town job for three nights. I had been scheduled to take the evening flight back home on the fourth day but the work had gone well, finishing early that morning. I just managed to catch a late morning flight to my hometown, not having the time to call to my wife before boarding. I'd picked my car up from the airport which is close to home, so it didn't seem worthwhile ringing my wife and I was home mid-day.
There was another car in our driveway. I recognized it as belonging to Ali, a friend of my wife. Ali was a tough looking woman with a short, no-nonsense hair style. I knew she was strong, self-assured and I'm not certain that she liked me. I parked on the road, took my bag and opened our door. I don't like slamming doors, so I always close the door softly. I kicked off my shoes and went inside. For some reason, I didn't call out and I must have entered the house very quietly.
I could hear the unmistakable sounds of sex coming from the main bedroom.
I went down the hallway to the bedroom where the door was wide open. I looked in. My wife was on the bed, on her back with Ali half on top of her. Both were naked with my wife's legs open wide. Ali was kissing her and finger fucking her, thrusting two fingers into her pussy at once, making her say "oh, oh, oh," with each inwards thrust as she brought my wife to a climax. My cock went hard, with an obvious bulge in my pants.
Ali was the first to realize I was there. She stopped kissing and fingering my wife, but kept her fingers in her pussy. She calmly looked up at me.
"My, you're home early."
My wife struggled to raise herself up, but Ali used her weight to hold her down.
"Lie still" she commanded. Ali looked at my hard on.
