Mother in law was at home visiting wife while I was out at a work function. Unbeknown to me she ended up staying the night. We give her our room so she gets her own ensuite instead of sharing with 3 kids.

I had no idea she was staying the night when I arrived home about midnight after several drinks. I quietly snuck into our bedroom in the dark and undressed before slipping into bed. Moving across to what I thought was my wife I pressed against her back and laid one hand on her hip. She had just a tee shirt on.

She stirred slightly and pressed back against me. Slowly I ran my hand up her waist under her tee-shirt. I had no reason to believe it wasn't my wife as I started to caress her breasts.

To be continued....