singlemalt , she could always book a room for 2, you and her. Then when she checks in she could just say something vague, like, "I am not sure when my husband will show up".

Hunki and I are grandfathered in as co-owners of our HHonors account, but he is the sole name on our SPG account. Nevertheless, I still am the only one that communicates with SPG or Hilton on-line or on the phone and they never ask any questions, and our daughter frequently calls UA to get award tickets using my account and never has a problem. She is, of course, very good about requesting permission before booking a ticket and she always seems to find saver awards, even in the busiest of times.