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Side Mistress 

A side mistress is a lady that your lady knows about but they don't do anything about it because it's perfectly fine with the both of them.
Sally knew Bill was with Victoria, his new side mistress, but she didn't do anything to destroy Bill because Sally and Victoria were secretly lesbians on the down low.
Side Mistress by Ernit July 3, 2023

Bar Mistress 

A married woman who has been banging dudes on the side since the couple started dating.
Husband “you’ve been banging Corey this whole time?”
Wife “ Yes, I’m a bar mistress
Bar Mistress by HOTCARLD August 16, 2023

Peg Mistress Dom

A female or femme-presenting dominatrix who who practices sexual act where a woman uses a strap-on dildo to penetrate a male partner.
Louise: “Hey, I saw someone describe themselves as a ‘peg mistress dom’—what does that even mean?”

Marquez: “It’s kind of a mashup term. Think of a dominant woman who leans into a mistress-style dynamic and also incorporates pegging into her play.”

Louise: “So basically someone who’s in charge and very intentional about that kind of dynamic?”

Marquez: “Exactly. It’s more about the power exchange and control vibe, just with that specific element included.”
Peg Mistress Dom by Blackfin April 23, 2026

Yes Mistress'd 

"John got yes mistress'd last night by his skank wife."

Denki's Mistress 

A huge Denki Simp who thinks they’ll meet him one day 🥲

Ex: The person who is writing this ;D
I’m Denki's Mistress— JIROU BETTER BACK UP

murder house mistress 

Murder house mistress is a fellow tiktoker who makes many videos of ahs not only are they a really big fan of American horror story but they are also married to Evan Peters
Person 1: “Who’s murder house mistress?”
Person 2:” only the best tiktoker in history!”