Need Help before I blow a fuse.

[20&lost]

LRT question. When doing the LRT it says that one of the things you should avoid is scheduling things in the future. I have an opportunity to sign up for a dive in the Georgia Aquarium and take the kids in January but I have to do soon as there are only 4 spots left. Me my D and S are certified and I know my W wants to be. Should or how to approach the family with this opportunity? I know my kids would love it and who wouldn't love diving with whale sharks. Do not know how to approach W with this as she is still upset that I got my diving cert even tho she has had every opportunity to get hers.