I'm completely shocked by this. Shocked, shocked!
No, it's the other one. Nonplussed. Completely nonplussed by this. I recall that, on this very forum, I have pointed out that if marriage is not about the interests in the progeny that result (which is what gay marriage claims), then there is no logical reason that incest should be a disqualification for marriage/relationships.
And after mocking such an argument (because it was inconvenient at the time) the left is now pushing on to prove me correct. How predictable. I suppose it was this or pedophilia next on the way down. (Please, go ahead and mock that idea, too. 20 years ago, people would have laughed at the idea that our country would be sending a woman to jail for refusing to marry two gay people, but we've done that and more.)