So I am getting married at a local church and then using a local facility (essentially the fellowship hall for several churches) nearby for my reception. As my wedding is around Christmas it so happens that my fiancés family is having a church dinner the next night at the same location. My future MIL asked if I would mind leaving the decorations up until after the party the next night. My fiancé stated they would clean up afterwards. However now they are saying they shouldn't have to clean since it's the brides families responsibility to clean up. I was aware my family was supposed to clean by etiquette and had made arrangements to have everything cleaned up by the next morning. However, the people who could clean Saturday night cannot clean up Sunday. I feel like the burden of cleaning shouldn't fall on me and my family after his family uses everything the next day. They not only want us to clean up all the food and such the night of the wedding but then return the next day and remove everything they dirtied and all the decorations. Any advice how to handle this? I want to have a good relationship with my fiancés family but I also do not want to be taken advantage of.