AITAH for (briefly) showing my friends a thong pic of my wife?

My wife is pretty upset about this… last week, while my wife was bending over doing laundry in her tights, I (lovingly) smacked her butt. She then pulled down her tights a little bit to reveal the top of the pink thong she was wearing. I pulled out my phone a snapped a picture. We kissed and parted ways back to housework.

A few days later, I’m out for drinks with some guy friends and one of the guys strikes up a conversation about flirting with his wife and having more fun together as a couple. A few drinks in, I make the (questionable) choice to quickly flash her pic to my friends at the table, to share that we’re flirty with one another at home like that too.

Fast forward to that night, a few more drinks in me, I return home and we embrace at the door. She teases me again because she’s in the same tights. I then let it slip that “I’m not the only one who loves that ass”…. And the story sort of slips out of me about how I showed my friends that night. She was pretty upset. I thought it was pretty innocent and still do to be honest.