Visiting my wife's mothers last weekend, she and my wife got talking as I watched the football. They disappeared for a while and I thought nothing of it. Needing a pee I walked upstairs and used the bathroom, then washed my hands and was about to go back down. That's when I heard gentle moaning coming from what I knew to be my mother in laws bedroom. Poking my head around the half open door, I saw something which is now burned into my mind. On her back naked was my mother law, and lay also naked in between her legs was my wife licking her own mothers pussy. I watched for about five minutes maybe, getting a huge erection listening and watching them have oral sex. At one point my mother in law arched her back, holding her daughters head and told her she was orgasming. My wife lifted her head and and turned slightly to the door. I darted back, but I'm sure she saw me.
Back downstairs with the vision of my wife pleasuring her own mom, my wife entered and smiled at me. She asked me if everything was okay, to which I could only nod. Minutes later her mother entered and asked me if I wanted a drink. I said yes and she fetched me a beer. Drinking it al I could think about was seeing her tits and watching my wife lick out her pussy.
I know that my mother in law has been divorced from my wife's dad for about two years now. (Split for about four) I also know they're extremely close, but since being with her the past two and half years (Now married for eight months) I didn't have a clue they were having sex together.
Neither of them mentioned that they'd seen me watching them having sex, so I kept quiet about it. What I did say was, I'd be joining them this coming weekend, as I'd previously told them I won't be able to make it. My wife grinned a massive smile and my mother in law said "Good maybe you could record the sport and join us". She didn't add to that statement, but she give my wife a knowing wink.
All this week so far, all I've thought about is what I saw, and what could be happening at the weekend. The one thing I haven't said, is not long after I got together with my wife, her mother did try to seduce me in her home. She was blind drunk at the time and I've never mentioned it to my wife. But now thinking about that and what happened last weekend, I'm now thinking my wife does know and they've both thought about including me.
This might all get out of hand I don't know, and I might be reading way too much into all this. But from what I've seen and heard this past week, I'm sure my wife wants me to fuck her mom, but just won't ask me straight out.