Here is what I plan, please tell me if I am wrong.
We have 225 points and my Mom will be adding 50 points to our account (they will be hers but in our account under our name). We will all be going on a cruise in January 2010 and we (my DH and me and kids) will be using our points to pay for ours and maybe some cash for one of our kids, my mom will also be using her points to pay for hers.
My family will have 225 points come available on December 1, 2008 (08 UY) and 225 come available on December 1, 2009 (09 UY). Our cruise will probably cost about 525 points (unless we pay cash for one kid). Which means we will have to borrow 60-75 points from 2010 UY. Can this be done or am I out of the allowed date ranges? Same thing for my Mom, she needs about 150, she will have 50 for '08, 50 for '09 and will need to borrow 50 for '10.