One day I had gone with my buddy back to his apartment he shares with his wife to grab a rare horror movie on DVD (we're both huge horror fans) he had wanted to show me from his bedroom. When he got distracted by his neighbor whose car broke down, he suggested I just go inside, and put the DVD into the machine and watch it, and he'd be inside in a minute. Well, I headed inside (the door wasn't locked, as his wife was home), and headed for the wide open bedroom door, from which I heard the sounds of moaning and bed springs creaking. And there was his wife, laying face down in bed in her panties and tee shirt, humping the bed like there was no tomorrow. I backed out as quietly as possible, feeling both embarrassed and sexually excited, as she continued to pump her ass up and down as she went to town on the mattress. Outside, I mumbled to my friend that I couldn't find the DVD. Needless to say, I wasn't going to blurt out that I had just witnessed his wife masturbating. A few minutes later, after my friend admitted he didn't know nearly enough about cars to help (we're both very much nerds), we walked into his apartment, where his wife, now fully dressed, said hi to me. I awkwardly said hi back as I followed my friend into their bedroom. There, my friend showed me the DVD disk was in plain view, and put it into the player. Sitting down on the bed, he motioned for me to sit down beside him. I sat down... when I immediately felt his wife's wet spot soaking through my shorts. Somehow, I stayed quiet and watched the DVD, even though my ass was wet with lady cum.