After kids are 18, if they’re still dependent

[User69371527]

What happens when DC are 18 if they are still financially dependent and living at home/at uni?
If I am the resident parent and ex spouse is very high earning compared to me, is it just the case that maintenance will have stopped and I just have to hope he supports them directly?
(he won’t agree to spousal maintenance)

You seem to be trying to reassure yourself that he will behave honourably towards your children in the future. This is not always the case in fact most of the time it turns sour over time, a new partner for either of you in the future and it will change believe me. Please make sure you get something legal in place to protect yourself and your children financially until they have become independent.

Once mine turned 18 the CM continued whilst in full time education, and was split 2/3 to them and 1/3 to me whilst they were at university. If they hadn't gone to uni it would have ended at the end of sixth form.
This was all in our order from when they were 3 and 5 as my solicitor was aware that circumstances change over time (which it did as he got remarried).
Protect your children (and yourself) as much as you can, if he is a good dad there won't be a problem having it legalised!

Perhaps it would be more easily accepted by him if stipulated that financial support directly paid to children when at uni rather than to you.