I think you just have to deal with it. If you're jumping for a towel or something right at that moment it kinda ruins the mood. If you come inside her and she puts her underwear back on quickly it helps not make a mess, but then she's gotta deal with it. Just wash your sheets, it'll come out.
Have sex in the same spot every night. At the end of the week, dry out the sheets, cut the crispy area into flavoured chips and put them in bowls for people who are prudes. Enjoy!
Just place a large thick thirsty towel under her & it saves power washing a whole bed sheet & most people will have plenty of towels in their laundry cupboard compared to spare sheets?
This cracked me up because white sheets are the very worst choice of color if you are trying to solve this problem. lol
My boyfriend and I love the stains we leave behind from his cum spilling out; it's like a signature! Especially on that hotel bed. But seriously, if it's a problem for both of you, use towels. Duh.