A Mommynatrix is just as it sounds. It's a dominating woman that treats adult men and women lovers as their own little children, and does so in a sexually humiliating way, usually involving pain and embarrassment.
"Wow. Cathy has really become a Mommynatrix since she married Greg. He tells me how she treats him and it's crazy to say the least."
by dw8177 February 20, 2017