I have 3 ideas.

One is use a water bottle to squirt her? Don't know if that will work or if she will be one of those dogs who thinks a squirt is fun.

Next is spray the furniture with a mix of white vinegar and water. Equal parts of each. It should be dilute enough that you and I wouldn't smell it, but the dog will. This works for cats, as does the water.

Finally, if you check with the pet catalogs, there is something you can put on the furniture to keep them off. Here is link that lists a few of them, you can probably find others, and / or better prices for these. I have not used any of these; the first 2 ideas above have worked for me.

http://www.nextag.com/keep-pet-off-f...re/search-html