Originally Posted by BriGuy

Actually, yes -- just not in one shot.

Your mother can convert her AA miles to HH points, and then transfer those HH points to you:

HHonors members can now transfer HHonors bonus points to other HHonors members that can be used towards hotel stays, airline tickets or any other Hilton HHonors reward.

HHonors points can be transferred to any other HHonors member in increments of 10,000 points, at a cost of $25.00 per 10,000 points. This rate applies to all points transferred up to 200,000. After 200,000 points have been transferred in one calendar year, all additional transfers are free of charge!