Nice easy one for you, take a shower or ask to take one. When your in the shower call her in and get her to get in with you. Either that or pull her into the bathroom and say lets have a shower and start getting naked. When your both naked with hot water running over you, LMR pretty much never happens. I discovered this at a hostel with a German girl I'd met 3 hours before due to having no other real option and have used it many times since.