Termination.

[Lee-Bee]

What is your usual end of care policy? Do they need to provide a certain amount of notice (paid)? If so then word it so they are giving notice and don't have to pay for that notice period after the child leaves care. Much harder to enforce but hopefully it is enough for them to decide and give notice.

Since you only terminated one child they technically need to give notice if they wish to pull the other child. They likely aren't thinking about this so you just need to remind them.