His Cock Was Stuck Inside Her

Discussing our sexual pasts one night, we told each other about some of the things each of us had done.
My wife said about one of her many lovers before me.
A little drunk at a party she ended in bed with a guy well teenager actually, several years younger than her!
He was fucking her and was just about to climax when his mates burst into the room.
He went to pull out of her but his cock was momentarily stuck inside her!
She was so embarrassed, all his mates saw them locked together.
Her semi naked, with him between her legs… bare butt and everything!
It was only seconds, but he had somehow knotted with her!
When he pulled out, his mates could see all that she had.
Has anyone else had this experience of a type of knotting!