I'm not really sure if this is an aibu, but I just don't know what else to do.
I spilt from my ex, dcs dad 5 years ago and we've had a pretty amicable relationship with only the odd blow up of small things.
Last year he moved in with a woman 14 years younger than him and 12 years younger than me, since then there has been nothing but trouble. My DC have been to their house once although he has seen them at mine and taken them out, but no overnights, which was one of our main arguments.
Two months ago his girlfriend hacked into his phone and got personal information about one of our DC from a group chat created by the club that he goes to, which she denies doing. I let that slide as I didn't want to get into a fight with either of them over it.
Then last week I had someone request me on Facebook and Instagram, it turns out it was her and her friends trying to look at profile, its since transpired that she is extremely jealous of me and thinks that I'm sleeping with my ex, which I'm not.
I told him what had happened and again shes denying it, but dropping herself in it as she told him about old pictures that I have up of him and the dcs.
So shes kicked off again and locked him out of the house they live in, also not for the first time and he ended up sleeping on my sofa. Now I'm trying my best not to get involved but I really don't know what to do, as this woman also wants to spend time with my dcs and I'm struggling to trust her as she seems totally unhinged.