For really hardcore marathon sex, I'd probably opt not to use mascara at all (since even waterproof runs for you, as it does for me), and use:
• MAC's Liquidlast liner or its recently-discovered equivalent, Jemma Kidd's i-tech
• My new Yaby pearl paints, which are waterproof eyeshadows (WHAT!!!)
• a light, natural-feeling, long-lasting foundation like MUFE Face & Body (and NOT my MAC Studio Fix, which rubs off and oxidizes and whatnot...don't want that in your pillows when you're face down with your face smushed into the bed) since I'll get sweaty and I don't want it to get cakey
• a nude lipstick with a slutty sparkly pearly lipgloss over it for blowjob lips
...I don't want any dark colors getting all over my face
• maybe a cheek stain instead of a blush so it lasts longer?