Well. if you gauged her reaction correctly, she is not at all opposed to the attention, so my guess is that if you encourage her to flirt with another guy and seduce him, she would happily take-up your challenge.
Tell her that if she succeeds, she can actually have him anytime she wants, and you will let her, because you want her to be filled......, I mean... fulfilled.
Tell her that if she succeeds, she can actually have him anytime she wants, and you will let her, because you want her to be filled......, I mean... fulfilled.