bdsamm I am not really understanding the arguments here. Christine is a 25 year old adult woman in the United States and unless she is incapacited for some reason she is capable of living on her own and making her own decisions. Maybe Mother will want her to wear a belt for Mother's comfort but, still up to Christine.
If she is living at her Mothers and is going to be evicted there are plenty of organizations that will intervene since she has been living there for some time and can't just be summarily kicked out.
Now in my mind there are several good reasons for her to wear a belt. Sexual Assault, bad Date, chance of too much alcohol and possibly she can be convinced of that by cooler heads. If she was nearby I would try.
As to Mother wearing a belt, what does that have to do with anything in this case?
I'm not familiar with the case you refer to. I was addressing @Jonas points about adults forcing minors into belts.