What Redpepper said
You should cherish that your wife treats herself with such dignity and is not willing to settle for any one that would have sex with her simply for the sake of sex (dime a dozen). There are lots of people who will engage in a purely physical encounter and that is fine and healthy for many...but, in my opinion, asking some one to work and form depth is often the greater measure of the person's intention and a measure of your worth to them; are you heart
so to speak.
Not everyone deserves your wifes intimacy...she is special and should be treated so by anyone she opens her heart to
Be proud of her.