Mother and "joke"?? Or is it something cognitive

[lolaflores]

We don't have a great relationship. Of late I've found her being even more aggressive than usual. Openly hostile as opposed to microaggrssion.
Today my daughter and I were having a conversation about a male friend of DD who's wife had had an affair and they were trying to make a go of it.
My mother chimes in "wl, I'm only surprised your DH Lola hasn't had an affair yet!" Followed y a huge guffaw.
She seemed taken aback I didn't find it funny.
There have een more and more of these sort of digs. I let them all go by. I e been grey rocking lately and feel she's upped her game and I bit today.
No one else gets this sort of shit off her. I've always been a target.
She's nearly 80 but very active. Ways lots on.
Or is she giving less of a fuck and just going for it?

Irritating and rude. You maybe could use the excuse that she's 80 and losing her inhibitions but i would have challenged her for speaking like that. Yanbu at all

I toldnher she was over the line but she insisted i had no sense of humour.
'Never have done. Don't kbow what yr problem is" then left in a huff.