Just keep in mind its a violation of T&Cs, so if there is an issue an Hilton finds out you werent there, you are risking a shut down and the loss of your points. Not worth the risk to me personally.

You are much better off transferring points to her and booking. I always recommend opening every potential account for both spouses, even if you arent going to use both. That way the 90 day limitation is gone in these sort of situations. My P2 has tons of accounts which have never been used, but are there just in case...