Mummy's Humiliation: Mother-In-Law Sissy (Mother-In-Law' Sissy Short Stories #8)
Honey Wells

One night of fun. Just a single taste of pure humiliation and submission would be enough for him. He didn't want to go behind his wife's back but what other choice did he have?
What he didn't see coming was that the stranger he had vomited all of his dreams and fantasies to, was his Mother-in-law.
He had been backed into a corner. She knew everything. She knew how he wanted to be touched and treated. She had lured him to a secluded place for him to experiences these kinks first hand. He couldn't back away, she gave him no other option.
He was going to have to allow her to lock him in. Sissify him. Spank him. Humiliated him until he was screaming for more.
He had been played and now Diego was going to experience was it was truly like to be out of control so that someone else can live out their forced feminization fantasies on him.