The 3 of us

My wife and I lived with my mother-in-law in her 4 bedroom house. My wife has c cup breasts, a great arse that I can’t keep my hands off (whenever she wears a skirt, I always slip my hand up her skirt to give her a bit of a rub and get her wet, never fails), and we have a great sex life.
My Mother-in-law is a bit taller and heavier than her daughter and before we were married it was just the 2 of them for years. We had the bedroom across the hall from her and she always gave us plenty of space.
This episode started one Sunday night after my wife (Michelle) and I had just finished having sex, lots of foreplay and lots of fucking, trying lots of different positions as always. Michelle got up to visit the bathroom to clean up a bit. No sooner had she left the room than she was back coming back in.
“Come here, you have to see this” she said to me in an urgent whisper.
” What’s up?” I replied
” Quick come and see” she said
So I slipped on a shirt and folowed her out of the room, she stood outside her mother’s bedroom, the door open just enough for us to see in. I stood behind her and looking over Michelle’s shoulder Iwe watched her mother lying on the bed, naked massaging her breasts, eyes closed and moaning with desire.
” She must have heard us having sex” Michelle whispered in my ear
” Yes, the horny bitch” I replied
We continued to watch as her mother slid one hand down from her breast to between her legs, which she now spread, and started playing with her clit, this in turn made her moans become louder.
I put my hands around Michelle’s waist and started to rub her stomach with both hands, one hand making its way to her breasts, the other snaking down to her pussy. Watching her mother play with herself and feeling my wife’s lovely breasts, the nipples hard and erect, made my cock become rock hard and I started rubbing my cock along her arse crack. Michelle placed her hands over mine as they roamed over her body, massaging her tits and slipping a finger between my fingers and into her pussy. I started kissing her neck and she reacted by slipping her tongue in my ear ( she kmows this always gets me going).
“I want to watch you fuck my mother” she whispered in my ear
“Mmmmm, you sure” I answered
” Oh yea, it’s been years since she’s had a root, and if she’s been listening to us fuck all the time, then it’s about time she got some of what I get. I want to watch her take your big, rock hard cock in her pussy”
“OK” I replied, and with that she crept into her mothers bedroom with me following.