<human>: Can you condense the text into a few key points?

The title pretty much says it all. I'm getting married in two weeks. My aunt called my mom today and said she would be bringing a date to the wedding. When she RSVPd she responded as one however,  I just had two people cancel so her bringing a date was not an issue. But now she's requesting a special meal be made for him as he's vegetarian and on a gluten free diet. 

My caterer is on vacation for another week. So by the time I can speak with him, we're a week from the wedding.  Is it unreasonable to ask them to prepare one single meal for this man, especially on short notice? Is it wrong that my aunt/her guest expect this? And am I obligated to accomodate it? Personally, as a guest, if I didnt care for the food or had special dietary needs, I would plan to eat before the event incase there was nothing I could have. 

 I have a lot on my plate right now and I'm a little irritated by this. Am I being irrational?
<bot>: getting married in 2 weeks. Aunt invites a guest at the last minute who has dietary restrictions. Is it necessary that I accomodate him?