I mean I get it to a point. It's one thing to know you are both working in the industry, it's another to have some random dude on socials actively tagging her account and being like "damn look how good your partner is fucking this other girl" with video link to her social media doorstep when she logs in.
Actors say that shit all the time, they know their SO is gonna be doing kissing/love scenes on set, but they don't wanna see it.