I was just curious if anyone else has attempted this:

My wife has about 5k miles in CO and AA but rarely flies to earn miles - in fact, most of the flights she has taken for our vacations are on free tix from my FF accounts so it is rare that she earns miles in her account. I have been keeping activity in these accounts (by requesting "paperless statements" and the like) to be certain that they do not expire but was wondering if it would be possible to transfer them to my Hilton Honors account.
At least we could then use them in the reasonably near future.

I would not doubt that somewhere in the fine print the rules do not permit this (transfer between accounts of different people), but I wonder if anyone has tried it and done it. I remember when I had a Diners Club card, I was told by a DC rep that they would transfer miles to anyone's account as long as the airline did not care and they told me that AA was the only airline that actually cared. I could also move her CO miles to my account if I want to pay a penny per mile - but I think that is a bit of a rip off. Any suggestions or should I just "babysit" the miles as I have been in the hope that she eventually gets more of them in the account?