I was invited to a wedding that I just found out it going to be a very formal event for a co-worker at my previous job that I am not all that close to anymore. It would require wearing a gown for me (which I have some prom dresses/old bridesmaid dresses to choose from) and a tux for my husband who does not even know the bride. My husband does not own a tux or anything that would meet the location's dress code and we cannot afford to purchase/rent a tux. (We have 2 other weddings that same month that we are in!) How do I tell the bride that I would love to come to her wedding but I just cannot afford it?