Namechanged for this as some of it might make me recogniseable in RL.
My parents are separated. My Mum has developed some kind of an obsession with an ex-popstar (1970s ish) who she met somewhere recently, and I'm pretty sure she is now having an affair with him (he's married). She and I don't discusss such things but I know she sees hime quite often.
I just find the while thing faintly ridiculous though. She's constantly glued to her mobile, reading or sending texts; she has a calendar of him on her wall. When I visited just the other day she put on a video of his band performing on TOTP; she didn't tell me it was him, or that it was a video, but I thought I recognised him and looked the band up on Wikipedia. After the song finished she changed the channel back to the TV. It was just very odd, maybe she was hoping I'd comment that it was a good song?? If she hasn't seen or heard from him in a while she gets moody and depressed and acts like a grumpy teenager.
She's on FB and sometimes 'likes' things to do with him or his band and the whole thing just makes me roll my eyes. AIBU?