Not sure if this story total fits but it kind of does,.
One night, my wife woke up in middle of night and woke me up.
She got me aroused, then rolled on top of me, still with her underwear on and mounted me. So now my penis is pushing her pantys inside her and she is appearing to enjoy it, I was thinking should I say something? Is she doing this on purpose ? I just went with it, she was enjoying it and I was thinking thinking this is a little kinky.
We finished, went back to sleep and she woke up with a "rug burn" just on the inside of her vagina. She was wondering why she had this, and told her...she was like why didn't you say something? Laughing I said you were enjoying it and I thought you were trying something new.
I took a picture of this burn. Posted in my images. She is very wide open, big ureathra