My cousin showed up high to my baby shower!

I had my baby shower Saturday and I had a wonderful time and a great turn out! However, I have been upset ever since then... My big cousin, we grew up as sisters, showed up to my baby shower higher than a kite. Whenever she walked in she seemed fine, but the longer she was there the more it was noticeable. First it was small things like stumbling or tripping a couple times, and then as I was opening my gifts she was passing out right in front of everyone! I was sitting at a table talking to two of my close friends and she comes over and literally starts begging me to be my daughter's godmother in front of them. There is absolutely NO WAY I would let her be around my baby, let alone make her my baby's godmother. She stayed after the baby shower to help "clean up" and passed out in the bathroom for almost an hour, my dad had to go wake her up. I'm so embarrassed of her and I can't believe she would do this to me. I would have never invited her if I knew she would be like that.