wife thinks that no one is going to want to have sex with her, how do I find a man?

he will make you cum harder than your ever cum before more times and for longer each time, that full feeling will control you every thought after he fucks you
 
Well, you recommend that she fuck him first by herself
that would really be up to her and her comfort level as well as communication between the 2 of you. It might be better that way for the first time even if you in the house just not in bed with them as long as you have the control to not bother them while they are "engaged" so to speak.