Yes is very easy ^. I have done it with my friend who is Plat. I check in early, no problems. The booking includes my name and they come in later.

Just call Plat Concierge to have them include your wife's name in the booking and also advise hotel of the arrangements. It really does work well .

Alternatively, as others have suggested, you could perhaps start sharing some of the nights at the END of your stays and put them in your wife's name. If you stay that much (ie 140 nights) - doing 25 in wife's name is a walk in the park for Plat (and well worth it IMHO). If you do this at end of stay hopefully they dont kick you out of the suite you may have been given at beginning of stay because you are PLAT . On this of course, YMMV .

Good luck.