Her womb is too old and dried up to offer the excuse that the gay transportation sec used.
The "I have a headache" excuse is as old as time.
Hot marriage tip for you inexperienced losers from AC: Bring a bottle of aspirin to your bedroom and offer a couple to your wife. When she asks why, respond, "It's for your headache."
When she says, "I don't have a headache," this is your opening. Start taking off your clothes so you can get down to bidness. (Works 30% of the time 70% of the time.)
In truth the best I've got out of pulling this stunt is a brief laugh. The worst? Getting something thrown my direction from the bedroom dresser.