My sister the drama queen

A couple months ago, I vented on here about my sister complaining about how dare I plan a wedding during the school year because she couldn't possibly attend my wedding even though it's on a Saturday and she doesn't go to class as it is. Well today, I came home because my mom found some lights for the reception that she wanted to show (yay post Christmas sale) and my sister is home from college for break. So my sister sits there as my mom and I discuss different wedding plans. Well my sister starts in and bluntly asks how many friends she could bring. My mom tried to explain to her that it is a wedding not a party and on top of that it's tops 50 people. My sister starts to complain and demands that she gets to bring friends with her or else she will be bored and not have fun. She did kindly offer to let me know how many a few days in advance (cue eye roll). I was completely dumbfounded the entire conversation.