My wife walked into the bathroom during a hanging session recently, she's seen all my gear & knows what it's for by my basic description but she's never seen it in action. She just went, "oh!" and i stupidly just grinned and waved at her like a dummy, we laughed and went about our day, lucky it wasn't a few minutes earlier as i was doing btc hanging LOL.
My wife is good like that though, a lot of my p.e sessions wouldn't happen if the wife didn't run interference & free up a spare hour in the bathroom free from kids, she understands it's almost like meditation these days & gives me my time to myself, grateful she's supportive like that