How do you cleanup after 'water sports'?

This question is probably not what you think. I'm a lucky guy with an incredibly open relationship with my girlfriend. Her friend comes over sometimes and I get to have sex with both girls. The only downside is that they like to pee places that they shouldn't. And that's not so bad either because honestly I get off like crazy watching them. I don't really want them to stop but I have a slight problem with the cleanup. I can just pick up the tissues around the house, and steam clean the carpet, but what do I do about the couch? They like to spread the cushions and pee into the couch. It's starting to really smell. Time to get a new couch?
How do you cleanup after 'water sports'?
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