Fuck no......she should give you head regardless. God says once she signs on to the deal she's ours to have when we want. It's a sin to deny us our lustful pleasures......wait....she is your wife right?
C.H.U.D.
"Greatness is not an act... but a habit.Greatness is not an act... but a habit." -Greg Jennings
So you are co-virginity acceptors, she is younger than you, and you will have sweaty balls?
I would recommend shaking up a bottle of 7up pre-cock ingestion and giving yourself a bit of a refresher spray. Not only will the bubbles cleanse you, but the lemon-lime scent will attract her deeper into your man parts, enforcing the deep, soulful connection you have before you drop your load on her. By load, I mean ejaculate. Do not poop on your lover. Unless she tries to run.
"You're all very smart, and I'm very dumb." - Partial
If you are into poop especially from or on your lover there is a wonderful thread with pictures in the garbage can some where.