If it meant you had to spend it with your MIL?
MIL told us yesterday that she wants to take us to Disney in December of 2015. It's awhile off, but I am torn between "Yay! Free trip to Disney!" and "Oh hell no. We'll go on our own and pay for everything."
She doesn't know we hope to have our last baby right around then, so it's probably a non-issue anyway. I don't hate the woman but she absolutely drives me nuts. She's very generous though, obviously.
ETA: I should have said "or vacation place you like" since I know not everyone wants to go to Disney at all.
DS (7 years old) from FET in 2010
DD (5 years old) from IUI in 2012
TTC 3rd and final!: IUI #1 in progress!