OIN have the unprotected sex, just pull out when it's time or "be there just for her" ;-)
- stop making this an issue, have the sex, the wife wants to be close to you, I'm assuming you've had sex enough times that you can "control" your part in this process, if not, here's your perfect opportunity to get some practice in
Just do it! (literally)
If he wants to bond to his wife its the fastest way to do so. If he's worried about pregnancy, see what he can do from a male perspective that will kill the sperm or render them useless without the obvious condom.