Mistress

a mistress is a female girl or woman who has sex with an married man, knowing he is married. and they will keep this up for the entire marriage. i dont know all the details he may support her as well.

because of her beauty he made her his mistress...that he couldn't resist her even though he was happily married.

Toe Mistress

A girl that you're only comfortable sucking toes for.
(does not have anything to do with the word mistress)
A good word, sexy, cute, and kinky

I called my girlfriend a toe mistress because I love sucking her toes.
hey toe mistress I want to suck your toes again
FYI I don't have a wife just my girlfriend