I have noticed that the parents (esp the mothers) of “transgender children” often seem to have a big investment in being special, displaying a sensitivity that others lack, and exhibiting themselves for public applause. Part of the consequences, of course, is the pained realisation that they are then victims of “homophobic abuse.” The attention seeking is blatant.
The children are the victims in this game. In this case, I would suggest they spend some money on a dentist, and have their son’s teeth fixed.
What you described is best summed up as The Munchausen Syndrome, where the child illness be it real or oftimes imaginary, becomes a way for the parent, usually the mother, to gain attention, pity and admiration. Many children have been killed or had their lived ruined while the mom plays the Stoic Savior-Martyr Parent, shining strong, midst all the chaos and calamity. Chaos and calamity that is often deliberately caused by the pathologic parent. It takes a truly strong and confident second parent to call their partner out on inappropriate behavior. Who would want to believe their spouse was capable of something so damaging and sick?