Not sure if this counts.
I was married for 27 yrs. DH died during lockdown. By then, his ex was with partner no. 4. (DH left his ex when he found out about the BF who became her 2nd partner.)
His kids told me they couldn't come to the funeral because of lockdown: one was shielding; the other had developed adult onset asthma. The adult grandchild's parent thought that the funeral would be too upsetting for them.
Could their mother represent them instead? I agreed. I told them, truthfully, that I'd expected that she would want to attend. I later found out that it had been the ex's idea that she should go instead of the kids.
3 days after the funeral, I was asleep in the back bedroom, knocked out by Diazepam and sleeping tablets.
I was woken by loud banging at the front door.
I staggered out, pulled on my jeans...
Open the door. The ex.
She was "just passing" because she was walking the dog. NB. She lives in the next village half the week; the other half, she lives up north in her latest partner's village.
Latterly, we'd got on all right - in spite of the weird things she'd come out with. A couple of times, prior to lockdown: "You must be the same as me: sick of dealing with the dead and dying." (I cared for both my parents and my husband.)
I'm not sure now whether she said something similar this time. It's a bit of a blur.
She told me she was tired of the flowers she was laying at my in-laws' grave being eaten by rabbits. She was going to put down plastic flowers and she'd attach a label to say they were from her, me and the kids.
I was a bit nonplussed, but said 'That's nice of you...' Bear in mind, I was having great difficulty holding things together.
Then: "Can I ask what you're doing with DH's ashes?"
Me, taken aback: "They've already been scattered, as per his wishes." [I later realised that they wouldn't have been - apparently, the crem keeps them for a week before scattering them."
"Oh. At the Garden of Remembrance? That's nice..."
Then she left.
I later found out that she was expecting me to place the ashes in my in-laws' grave, nearly 3 hrs drive away from my home, but close by where she lives with her partner.