A few years ago, while we were still married my husband and I started a fund to save for a family vacation. Our goal was to take the boys to Walt Disney World. When we divorced, it began to feel like the two of us were racing each other to be the one who took the kids on the trip. Our situations, financially did not provide for either of us to make the trip. However, this past fall, I came up with an idea and presented it to my ex-husband. That idea? The four of us go to Walt...