OP, you take your children on holiday yourself as you are paying.
If he doesn't want to go that is fine.
Can your parent join you?
Tell him to fund his childs holiday and go on his own.
These are precious years when your children are young.
You likely made a mistake having children with him, don't compound it by spoiling this time by being made to feel bad for wanting a peaceful time on your own with your children on holiday.
Men love to manipulate women to feel bad for wanting anything with their own children.
Do you pay towards his child?
If so perhaps rethink it.
I wish women could realise the awful consequences of having children with men who already have them.
Not surprisingly you are the main earner.
They always ensure second time round she is solvent, home owning and a good earner.
Most would never re do it, if they had the chance.
My friends daughter has recently broken up with the father of her child.
They were living in her house and planning on marrying at Christmas.
She had a sudden invitation during the summer to go to a friends villa in Spain for 2 weeks with her 1 year old as her husband couldn'tmake it.
Her friend also has a 1 year old.
He was very upset because she refused to take his 6 year old daughter.
Apparently he thought she should as it would help out with summer childcare.
She wouldn't back down. He gave her the silent treatment for the week beforeh she left.
She came back from the holiday and told him it was over and she was done.
He tried to back track but she told him it was over and she could not move on from his silent treatment of her and it was over.
She wanted him out of her house.
Thank god they hadn't married is what every one of her mothers friends said.
She looked after his child a lot during her mat leave because of pressure from him and his ex, which she now bitterly regrets.
Never again.