A lady I used to work with would often bring her bulldog with her to work. The dog would mosey through the office all day or lay at her desk, never a problem. But, he was an older dog. I would physically prevent the dog from getting on the furniture with a barrier until he learns that is not wanted behavior. People above have give good advice on your problem. Just be sure you clean the pee area thoroughly with an enzymatic cleaner. We humans think it is clean, but the dog know better. I think your problem can be corrected with a little persistence.