Glad your mattress was safe....protectors are a great idea and the various enzyme sprays. Our dogs both sleep in beds in our conservatory (like a glassed in porch) they don't have the run of the house at night. Any accidents can be cleaned up easily as the bedding is all washable and the floor is tiled. We also leave the bathroom door open in case the cats get desperate (we have indoor outdoor cats with no litter trays). Our very old puss, Sarah is 15 and if she gets "caught short" she uses the drain-hole in the shower...not often but it's a lot easier to clean up.
If you don't have the enzyme stuff, the area can be cleaned with a vinegar and water solution, then totally covered with baking soda....sweep or vacuum off when the baking soda has absorbed all the moisture.