It hit Samantha. If anyone younger came to this party regardless of reason she could be as young as needing diapers. So she made a wish of "I wish no one under the age of 25 went to the party.". All she could think of was imagine if someone brought their 2 year old with them. She would be 1 due to her wish.
Samantha is enjoying the experience of hanging out with her cousin now that the two are almost the same age. Back when they were kids, Diana was so much younger Samantha saw her more as an annoyance than anything else. Sure they had gotten closer once Diana turned 18 and Samantha was excited to be asked to be a bridesmaid, but the relationship was so much different now. The two were more like childhood friends than cousins now.
What is a bit weird, is Samantha's memory. She remembers everything about her old life, but mixed in are memories of her new life. She remembers things like the law school education she just finished, Diana taking her out to have her "first drink" when she turned 21, and all other sorts of experiences and events. With all these new memories flooding her mind, Samantha didnt have to worry about younger people coming. People who had kids talked about having to find a sitter at the last second, or Diana's 13 year old sister couldnt come.
Thats when Samantha