Who Peed the Bed?

One of our cats has peed on our bed, a few times. 

Was it Ross?

Was it Lois? 

I don't know if we'll ever know for sure which cat has done it. Needless to say it's gross and of course the one time I leave the mattress cover off the cat get's in and on the bed. Dang it! So I've tried a bunch of different things to clean up. When it's just sheets I double wash them. The one time the cat got the mattress it took a few days of baking soda to soak up the wetness and then vinegar to disinfect and get rid of the smell. I love these cats soooooooooooooooo much  and I can not get rid of them so now we need to cat proof the house. And by cat proofing I mean shutting our bedroom door. Yay cats.

Who was it?!