Thanks for all your comments guys, really helpful!
Everything seems to be going alright so far. Spend a day this weekend with the kids and bf, ice skating and riding and I think it went really well.
The mother and I seem to be getting along although she's been pressuring to find out my age for the past week. Both through her asking people and getting the kids to find out. (unbeknown to me at the time). I shouldn't have been so naive when one of the kids asked me. I told him and looking back I should've known it was the mother trying to find out. Anyway I'm learning. :/ Poor boy was upset after going back to his mothers and he felt he was betraying me by telling his mum. Sweetheart!
Makes me feel terrible like I've put him in the middle but no one told me she'd been calling to find out until it was too late. I guess now every things out in the open, which is good.
My bf and I have a big horse comp at the end of the month that the kids have been allowed to go to. Going to be a massive weekend.. 6 horses, 3 floats. The 3 kids, myself and bf along with mine and his parents and the ex wife and her partner. Just hope it all goes well. I hope everyone can just be mature adults about the whole thing and get along for the kids sake.
I must say I did feel slightly awkward and out of place when the ex and her partner came to the house to pick up the kids. I felt as if I shouldn't have been there, in her old house, in her old lounge room. Ugh, come to think of it her old bed. All feels bad. I know it's 6 years ago but I still got the vibe she wasn't impressed to see me there. Just hope we can all be civilised for the kids sake and that they don't pick up any bad vibes.