And again another issue with parents ........

[5 Little Monkeys]

I offer a vacation discount too but its never been an issue as most only take 2-4 weeks a year....2 months is excessive!! I think I'll add in my contract that there's a limit lol

Do you have a limit in your contract? If not, it's not really fair to terminate them if they aren't breaking policy. However, asking for another discount on top of the one you already offer is rude IMO.