To not expect parents to help money wise?

[moita]

DH's mum has helped us financially quite a bit. This is her choice: we never asked but she has offered to pay for mainly household expenses and often treats us to meals out which I always say thank you for.

My parents don't do this but they give us free childcare whenever we need (MIL is unable to do this for reasons I totally understand). We have a disabled daughter they have done this last minute a lot.

DH likes taking digs at my mum and dad for being 'tight' which really pees me off.

I do wonder if he is a bit jealous they can help out more and his mum can't.

Anyone in a similar position?

It's wrong that he assumes parents should give money to their children, as a given.
This means he doesn't really appreciate what his own parents do, as he takes it as his right.
It's wrong that he is rude about your parents. For whatever reason, they have no obligation to give you money, even if they could afford it. He sounds very selfish and entitled.
It's wrong that he doesn't value the contribution your parents make - if you had to pay someone for that childcare, it would be expensive (if he must value everything in terms of money). It can be much harder to give time than for a wealthy person to give money. If he doesn't value what they do for your children, does he value what you do?
It's wrong that he's deliberately upsetting you.

All around, he sounds awful.

Your parents are helping money-wise - they are saving you all the childcare costs you would otherwise face. It really is that simple.