I learned early in my marriage that if caught floggin the dolphin the way to handle it is insist she come help and turn it into a larger event. Then all of a sudden you'll find she won't always want to interrupt your "meditations."
It's little things like that a man needs to know lol. Like when a friend of mine told me his wife always wakes up and interrogates him when he gets home late after benders. I told him my solution is to quit sneaking in all quiet. Kick the door in, bellow for your woman and stomp down the hall. If she doesn't want to put out she'll be "sleeping."