Madeline was, of course, in attendance! She was looking pretty in yellow and was all smiles throughout the entire event. She was her usual polite and bubbly self and would have made sure to hold conversation (real conversation, not just "Oh, hello!" and moving on) with each of the guests and thanked them for being in attendance. Even though she was probably logging away things to comment on later to Evangeline about each guest, she was a good society girl and naturally didn't show any judging on her face and was nothing less than gracious.
If anyone asked, she would have been happy to bring them up to speed with the wedding, which is completely on track with her scheduling. She would have been mum about her dress, of course, as that's a surprise, but otherwise would have been all abuzz about flowers and food and all that jazz.