OP kind of reminds me of my older brother. I remember in 2014 he got busted for having a Facebook account he had been keeping secret from his fiancé who he’d been with since 2010.
At the time my folks were in town staying with my wife and I for a long weekend while my brother and his fiancé had gone on a vacation. Well, my brother posted some pics on Facebook of him at the beach where they were, which my wife saw on my Facebook account which she then showed my mom. Well, my mom sends my brother and his fiancé an email saying she saw the pics he put on Facebook and that it looked like they were having a good time.
After midnight I get a phone call from my older brother who’s in a panic asking me what the fuck was going on as his fiancé was questioning him about “what Facebook photos? Since when do you have Facebook?” I told him what happened and he was furious and disgusted that I would let my wife near near my computer or to have access to my Facebook account. My brother is quite misogynistic, and I think was keeping his Facebook secret from his fiancé because I think he was more or less using it as a quasi-dating app since this was before Tinder really blew up. Whenever any of his activity showed up on my Facebook feed it would be him liking photos posted by girls in Japan and Korea, and he would frequently go on trips to Asia without his fiancé (who herself happens to be Korean) I’m pretty sure just to hook up with girls.
Anyway, somehow he weaselled his way out of it I guess, because to this day he still has Facebook and to this day still plays dumb around his now wife (they got married in 2015, had a kid in 2019 with another due in three weeks) about even having Facebook and she’s willfully blind to his shenanigans