My lady is a squirter. In a really big way. I dig it, but I'am running out of of towels/sheets and my mattress is getting destroyed. Any tips?

On the one hand it's awesome. But on the other, it is a LOT of liquid to have to deal with once, twice, or three times a day. The normal procedure is obviously to put down a towel that's been folded a couple of times, but short of getting a waterproof bed cover, I got nothin.

Just wanted to know how others deal with it.