Sometimes, ladies that pregnant aren't thinking super clearly and almost all thoughts are inward and self-centered. If you can afford to go, then go and have fun, if not, then graciously decline, guilt free.
If she lives THERE, sounds like she smartly doesn't want to travel late in the pregnancy for a second shower, and then I say ship it FedEx 2-day air or FedEx Ground, regrets and catch ya next time!
You can only do what you can. 4951