My wife was tuning me out, which meant no pussy becuase she did not think I was being a good boy. Her mother was living with us because she had Dementia and was all alone. My MIL was always a good looking and very shapely lady woman when she was younger, I always tried to sneak a peak up her skirt or a down-blouse whenever I could but she was always very modest.
One day I was home alone with the MIL & she was sitting in the easy chair watching TV unaware of anything around her. I walked over & said I needed to check on something, lifted her sweatshirt to expose her tits. They were still pretty nice for a woman in her 70's, fairly firm with nice nipples. I felt her up the told her I had to check her diaper to see if she was wet. I put my hand down the front of her pants & put two fingers in her pussy while feeling her tits with my other hand. I'm going to hell, I know, but whatever, pussy is pussy, tits are tits. I'd have fucked her if I had the chance & knew she wouldn't remember.