If this sounds a little nuts, I didn't get to meet this MIL because she sadly died about a year before I came into the picture. My now ex, was a lady who loved to fuck and she got it from her mother for sure. The mother was actively fucking two very old friends up into a month before she died, at the age of 83. My ex said also that her mother, as far as she knew, had fucked everyone of her son-in-laws. My kind of MIL
It seemed that every woman in this family usually started fucking around age 12 and found themselves pregnant at age 14. There was a great granddaughter, who at a very young age, was very sexually aware and interested. We figured that her mom and dad had fucked with her around, and she had certainly watched her mother get off with a vibrator, since we caught her doing the same on herself. My ex also had a sister she wanted me to fuck. Sadly, while we were friends, she didn't turn me on, at all.