Ex refusing childcare cover during holiday and making co-parenting difficult

[ThreeboysCH]

Myself and my ex were co-parenting fine months until he told me he was dating (to which I said I hope it's going well) and he asked if I was, once he found out I was he hit the roof, no longer co-parents amicably and will do anything to hurt me, even attempting to keep the kids from me.
I have this logged with various specialists, however, I am going on holiday with my current partner this month and he will not accept any form of idea I bring up for childcare.

I'm currently pregnant and this is causing me a lot of stress, we currently co-parent 50/50 one week with me and one week with him, I go away on his week but it runs over my week slightly. He will not agree to have the kids until the Wednesday and he won't swap over with anyone else besides me even though my mum has said she can have them from the Sunday (when we usually swap over) until I get back. The only option he is giving me is to cancel my holiday.

Has anyone dealt with similar controlling behaviour?

Oh gosh, to be honest I'm not the expert, my brother is. He's advising my sister, whose ex is a master manipulator, to seek help.

He does things like buys a £50 voucher for their son towards a ticket costing hundreds of pounds. For something the son is really into. Then the son says "dad's done his bit, why can't you do yours".

My sister was left nearly destitute when he left to go off with another woman. It was someone from work so they both have generous salaries. My sister, who took time off for maternity and went back part time, is struggling with most of the costs on one salary.

My parents had to bail her out to pay him off, or she'd also have been homeless. Despite him being the one to leave, he blames her, and hates her. He's trying to destroy her.

He should stick to his parenting arrangements and you should stick to yours.
Your not on good terms of course he isnt going to do you a favour.

There’s nothing wrong with booking a holiday without children.