Personally, I don't wear underwear when going out alone, and my husband always checks to make sure that I'm naked other than for my skirt and top, and yes, I have a hall-pass for those occasions.
How did you guess I bought it for her to wear with me. Instead, she wore out with her friends on girls night out. I can imagine someone sitting down at the table next to her attempting to feel her up and discover no panties.
Why would she wear it for you, when she knows every guy she dances with is going to feel her up on the dance floor if she wears it when you're not there
The moment she put that outfit on she knew she could fuck any guy she wanted that night so why would she settle for her husband dick, she would have been that horny that night maybe a dozen or more guys got to feel up her wet little married pussy