It sounds like you have decided, but if it helps, I am one of 3 sisters, and my parents said they would fund 5 years of university, which was effectively one degree and made us employable, anything after that was a choice we would make and fund ourselves.
Eldest daughter did a 5 year degree, got a job in that field, after 15 years self funded a masters and went in another career direction.
Middle daughter did a 5 year double degree, then had to pay for the additional year of practical training herself (working PT, and living at home paying peppercorn rent). They did a Masters in the same field about 3 years later, self funded, whilst working full time.
Third daughter did a 4 year degree, and it was always the joke in the family that she was ‘owed’ another year, if she ever wanted to go back for something. She later started a Masters in the same field, Self funded and whilst working full
time, but didn’t complete it through lack of interest and the thought that it wouldn’t increase employment opportunities vs the cost, time
and effort.
All 3 of us agree that having to fund anything over the initial degree was the right thing to do, as it made us value the education more, and put more thought into the choice (or to stop choosing it) for the right reasons (a career change for one, passion for the area and advancement for the second, and actually realising there was no need for the third).
Although middle daughter does feel a bit hard done by that she wasn’t employable without the extra 6th yr practical training and she funded that herself, but it’s not really an issue and her earning power is v high now, so it never comes up.
The important thing we all agree is that we were treated the same and we knew the ground rules.