Oops, I have invited myself on a trip with my nephew, his girlfriend and their sweet baby boy. But, I asked him to make sure his girlfriend was ok with me coming along and....I paid for most of the trip. It was so fun that we're doing it again this coming January and I can't wait to spend time with my family. Plus, I have already agreed to babysit so they can have a nice dinner. It might not be so bad, you never know, maybe your FIL might pay for the trip and agree to kid sitting duties.