Maybe if she goes in the house you can wipe it up with a newspaper or something and put it in the spot where you want her to go.

I had Benji house trained and then all of a sudden he started going to the bathroom inside right after I had let him out. I eventually found out that it was an attention issue. And whenever he went inside the house I'd make him sit in a corner and I'd ignore him for a few minutes. We found out that he was trying to get attention whether it was negative or positive, so that's why the ignoring him worked.