Pulling out a loose baby tooth will hurt a little and feel strange, but it's perfectly natural. Kids pull their own baby teeth out or have their parents do it all the time.
A baby tooth loose for a week should be pulled out if not falling out on its own. Take a plier and have your wife grab the child by the arms. Make sure she can't move but that she can see the pliers. Grab the tooth and pull as slowly as possible to make it a memorable event.
