I'm stuck in the middle between my ex and my DD and I don't like it. Or really know how to handle it 
In a nutshell, he's emotionally unavailable and totally lacks emotional intelligence. It's one of the main reasons we are no longer together. He gets caught up in work and it's an obsession he doesn't listen he won't be derailed or do anything else.
He is also very passive aggressive in his way of dealing with people - rather than say a straight out "no" he will put obstacle after obstacle after obstacle in the way of doing something if it's not something he wants. Which leaves the person trying to talk to him in no doubt he doesn't want to do it but he can say he never said no iyswim? So it's up to them if they don't do it it's nothing to do with him.
I think he has ASD traits but that's just my opinion I'm not an expert or qualified in any way.
DD is 13 going on 23. She has to take on things like cooking the meals, doing the washing as he simply would not remember to feed the kids when they are there, or wash clothes. She has to do a lot of the organising because he is incapable.
I don't have a problem with all of that - some of it, yes, but not all of it it's not all together a bad thing.
So, she has a birthday party she wants to go to on his access night this week. It is about 5 miles away, and is a meal out finishing at 8pm.
She asked him last night could she go, he asked her loads of questions said "Well it's a run to x, it's on a school night" all the usual stuff but he didn't actually say no. He told her the problem wasn't that it was on a school night, the problem was that he would have to take her to xtown, 5 miles away, it's a run out at 8pm to collect you was what he said (younger child is 9 years old not 9 months it's not that much hassle to put her in the car imho)
She texted me and then phoned me really upset that he wasn't going to let her go and I said if he can't take you and pick you up I can pick you and friend up if friend's mum gives you a lift over as I won't be finished work on time.
To cut an already long story short, I ended up phoning him and he's gone off on one. He doesn't have a problem with her going to the party, she shouldn't have spoken to me, he didn't say no.
But he was so so negative that she knew he wasn't going to say yes iyswim? And now that I've said I'll take her, he's said there's no need for me to be involved it's his access night, how dare I try to interfere.
He admitted he was working last night (he works from home) and he wasn't really listening to her and he was just trying to put obstacles up to test her (WTF?)
How can I help her without getting involved? And without him accusing me of interfering?