Pay close attention: there are two issues here
1. Whether you think you should be able to tell consenting adults what they can do in private irrespective of how icky you find their personal behavior.
2. Whether you think society should be forced to accept what most people consider deviant behavior as normal.
So, it is easily possibly to not care if Neal and Roger (pun intended) lock their antique shop for long "lunches" and yet be extremely opposed to an attempt to legislate the acceptance of deviant behavior.
There is indeed a difference, which is why it was interesting she said she was opposed to legalizing it, not just that she found it "icky" but they had the right to do it.
The idea that she would then be okay with gay marriage is so....beyond retarted.