Greetings, Saethydd:
WIshing you the best possible outcome.
We were such parents 30 years ago, until we woke up. Not re: TTATT, but that we would lose our child. It went against the "wisdom" meted out by The Society, but we, Mom and Dad, said you don't have to be a JW, just obey the house rules.
This newly liberated teenager became obedient and lost the rebel attitude. To this day our kid is kind, generous, and forgiving. Just never believed in the religion and we said okay.
Please hang in there.