Here’s the problem, johndoit: your wife has spent a long time having only you. Most women in her situation are very insecure about the idea of another man because of self-confidence and morality issues. The ONLY way you would overcome this is together – looking for someone to seduce her is just a desire to have what you want without having to be directly involved (i.e. having to risk her rejection of the idea).
This is up to you to communicate to her.