I've looked through the subtropes listed, and the Queer as Tropes index, and I don't actually see a clear trope that specifically covers same-sex marriages being forbidden. There's Out of the Closet, Into the Fire for when they're dangerous, but nothing that I've spotted for them being just plain forbidden, legally or socially. A good portion of the examples on this page instead of on sub-pages seem to be same-sex relationships, so it seems like there are enough for a trope. Am I just missing something?
I've looked through the subtropes listed, and the Queer as Tropes index, and I don't actually see a clear trope that specifically covers same-sex marriages being forbidden. There's Out of the Closet, Into the Fire for when they're dangerous, but nothing that I've spotted for them being just plain forbidden, legally or socially. A good portion of the examples on this page instead of on sub-pages seem to be same-sex relationships, so it seems like there are enough for a trope. Am I just missing something?