YOU SAID:
So, how long must Mommy wait to see you?
INTO JAPANESE
それで、ママはあなたに会うまでどれくらい待たなければならないの?
BACK INTO ENGLISH
So how long does mom have to wait to see you?
INTO JAPANESE
それで、お母さんはあなたに会うまでどれくらい待たなければなりませんか?
BACK INTO ENGLISH
So how long will mom have to wait to see you?
INTO JAPANESE
それで、お母さんはあなたに会うまでどれくらい待たなければならないのですか?
BACK INTO ENGLISH
So how long does mom have to wait to see you?
INTO JAPANESE
それで、お母さんはあなたに会うまでどれくらい待たなければなりませんか?
BACK INTO ENGLISH
So how long will mom have to wait to see you?
INTO JAPANESE
それで、お母さんはあなたに会うまでどれくらい待たなければならないのですか?
it is unlikely that this phrase will ever reach equilibrium