Name changed as potentially outing.
Long story short, very acrimonious divorce some 13 years ago. Other woman involved, lies, lies and more lies. I have moved on, lead a quiet but happy life, retrained, enjoyed a new career. Ex had plenty of new partners but seemed to hold some bitterness over money in particular (we both did OK out of the divorce, but I got more than he wanted me to have. He left it to the judge and it really didn’t go as he expected). He has never paid child maintenance.
My mum died recently. We have been clearing the house - we being me and our now teenage children. One child will probably live in it whilst he is at uni locally and ex dropped him some furniture there the other day whilst I was elsewhere. He picked up our wedding photo and took it with him - children tried to stop him on the basis it wasn’t his - but he did his usual ‘my rights’ bullshit that he trots out when he is challenged.
I didn’t want the photo. I would have given it to our son or binned it. I am not bothered about that. I don’t need it to mean anything. But I am angry that he just needed to piss all over my territory, like a dog, just because he could. I feel like he’s just denigrated my mum’s memory, somehow got the better of me, like he’s laughing at me.
I will keep my mouth shut because I recognise anything I say will just show him he’s got to me. I want to shout fuck off you fucking piece of scum into his face (preferably whilst having covid, at a short distance!) but most of all, I hope he has as to explain its presence in the car to the girlfriend he has literally just moved in with 
They’re like territorial animals, aren’t they?