AITA for exposing my husband’s “work wife” at his office party?

My husband (38M) has been talking a lot about his “work wife,” Lisa (34F). I thought it was just a joke at first, but it started bothering me when he began texting her outside of work, laughing at her messages at dinner, and even referring to her as his “other half” in front of me.

I told him it made me uncomfortable. He laughed and said I was overreacting.

So, at his office Christmas party, I decided to have some fun. I walked up to Lisa’s actual husband and said, “Hey, how do you feel about your wife having a ‘work husband’?”

He looked confused and said, “Who?”

Lisa turned bright red. My husband looked like he was about to faint. I just smiled and said, “Oh, my husband talks about her all the time. I figured you knew!”

The room went dead silent. Lisa’s husband pulled her aside, my husband started whisper-yelling at me, and the entire mood of the party changed.

On the way home, my husband screamed at me, saying I embarrassed him and made things "weird" at work. I told him that if he wasn’t doing anything inappropriate, why was he so worried?

Now he’s giving me the silent treatment, and some of his coworkers think I was being petty.

AITA?