My mom has been very overly assertive in her opinions on how my wedding day should be. She is helping with the costs of the wedding, but only to a certain point and then beyond that is on my fiance and me. My issue is that she keeps inviting guests without my knowledge, and keeps telling me I have to add items that I chose not to include due to the budget. However, with all of the items and guests that my mom added, she is pushing the budget over by $5k and won't be willing to cover those costs. What should I do to let her know I appreciate her opinions, but that since she is only covering a specific amount of the costs, that I can't accommodate all of her additions? What would you do?