The Watchtower cult is EXTREMELY dangerous. They will ruin your family and your life. I would not allow anyone I love to get within 1000 miles of those bastards. I would visit whoever is studying with the person I love and run them off.
As the head of the house I would make it crystal clear that no one in my house is having anything to do with those lying bastards.
I'm not trying to be rude but I don't see how if you claim to love someone you would not do everything in your power to keep that person out of the clutches of this twisted, sick, delusional cult.