I wonder if the parents are worried that the guests will assume they are hosting them after the ceremony. It could be a very uncomfortable situation.
Well, the wedding was today. I wonder how it went? I remember being poor. I taught students in Maryland who were poor. It is unusual that someone proclaims that they are "dirt poor". Most of the families I have known who lived in poverty didn't want to admit it. I do know one person who says she is proud to be poor. I don't understand her attitude. She had opportunities to get out of poverty, but she refused to consider them because she didn't want to change her lifestyle. I tried to help her but she wouldn't listen.No reflection on the OP. I don't know her circumstances, but the fact that she proclaimed her poverty struck me as unusual.Some of the nicest weddings I have seen have been very budget conscious. Some of the worst have had huge budgets and they went over the top trying to impress people. (I think everybody knew how much the bride's gown cost and how much each plate cost!) Poor =/=rude. Wealthy=/=polite.
Why don't you just call them and ask if they are coming?