Pretending you're serious for a minute..... whatever is going on with her private parts is no business of yours whatsoever.
Don't get played like other guys in that position. They start worrying so much about who else is hitting the mistress' nether regions or if she's been practicing good oral hygiene that it drives them crazy. Know what happens next? They start obsessing over her.... when that's not good enough they spend every available moment with her and eventually get caught.
A mistress is an outlet, bro. No more, no less. What she's doing when you're home is none of your business. If you can't keep things that simple straight in your head, get out of the game.
And another thing: We joke a lot around here and I'll probably take a lot of abuse for writing this but
women are not stupid. When you're hanging with the mistress someone might just be hanging out with your old lady. Don't go thinking she's to busy because it doesn't take very long to get sexed up. Especially don't think she's to loyal, honest, nice, etc.... you should expect the same level of loyalty, honesty, niceness, etc... you're showing her. Being married doesn't stop you so don't go thinking a wedding ring will plug a hole.
My answer would have been more graphic on the sex board, LOL!
Personally, I've never cheated on someone but don't know if it makes me a good person or not.