Rick Santorum's greatest fear: When possessive and plural apostrophes collide

This is Rick Santorum.

Rick Santorum is a republican politician who is deeply concerned for his country.

You see, Rick is worried about the gays. He is at pains for other people to see that if we let gays marry, everything will go totally shit.

For example, just think about this: what if two gay people marry (each other), OK fine, but then what if they become some sort of power couple who have a number of valuable assets? Assets, if you're following me, that HETEROSEXUAL people could have owned! What if they buy a holiday house, then a gay couple will have not one, but two houses. Those are TWO houses that one hetero couple could have owned. Nuff said!

So in this case, if you wanted to talk about the two houses of a gay couple, would you say 'Jane and Mary's Houses, or would you say Jane's and Mary's Houses?'

It's complicated, because it's like this: there's only one of Mary and Jane, but they have more than one house (until Rick Santorum becomes president, then they will just live in a mental institution for wayward girls).

When it comes to using pronouns, the rule is that the one that would stand in isolation is the correct one, and while this situation doesn't deal with pronouns, you should follow this rule when you are forced to say something awkward, and as Rick Santorum is at pains to emphasise, like Jane's and Mary's Houses.