Angelina it is strange how quickly the mother herself agreed to wear a belt.
Yes, I think that also suggests that it was something that she already wanted or needed at some level.
Angelina her mother cannot end this without denying her own morality.
I don't think most people would need to really believe anything more than "I don't like this any more and now I think it's stupid" in order to stop doing something as unusual and demanding as wearing a chastity belt. I certainly wouldn't expect it to require any deep change in their sexual morality.
Obviously I'm assuming there's no mental illness involved. If there is then who knows. But assuming she's basically sane, I think it's unlikely that she's doing anything that she doesn't want to, at least at some level.