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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."
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by dw8177 February 19, 2017
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