To solve this problem, what you should do now is: try to make agreement with your husband to employ a yan yan.
In the first moment, you may tell your husband that your 99 is old and she need a helper to help her to take care of the baby (and so on).....
i.e. your 99 take care of the baby, with the help of a bunbun.
Then, later on, ............ find some reasons and don't let your 99 come daily!