Ex was abusive and also had a drug problem. I went into a refuge 4 years ago, and spent a year there. When we returned home he continued to cause problems, broke an injunction, broke into my home, behaved horribly in front of the dc and was also found guilty of harrassment.
He last saw the dc (now 4 and 7) over 2.5 years ago at his mum's house, until his bail conditions at the time precluded him from contacting any of us or entering our borough.
About 1.5 years ago I received a solicitors letter from him seeking contact and I said it would need to be supervised in a contact centre - initially he agreed to this, but then nothing further happened.
The dc see his parents every couple of weeks - today when their frandma brought them home they said that ex had spent the day with them. Their grandma said he'd come to her house for a shower (I think he might be homeless) and she'd thought he would have gone by the time she picked them up from mine this morning and got back there - but he hadn't.
I'm really upset - that she let this happen, that this might give him a reason to start causing problems again, that it's confusing for the children, who witnessed unpleasant behaviour from him before, but enjoyed playing with him today.
I have no idea if he still has a drug problem. I do know he has messed up many opportunities to be a responsible dad, and that he didn't bother to pursue contact when he couldn't have it on his terms.
AIBU to be upset at his mum, and not know whether this will happen again.
Sorry it's so long