And same for me: my high school best friend saw it in Vegas for her sweet 16 (her family has money I could only dream of

More on my issues with Mom--
Tonight she told me that our cousin Sherry's best friend was planning to go on a trip to Ireland--and would be there in May--, but suddenly can't go.
Instead, she told Sherry who told my mom that she would like to go to Vegas with us.
....I'll explain more to make it understandable as to why this is not a good thing.
The woman's name is Chase, and when Chase gets together with Sherry they become very....loud. They like to drink together and talk about sex and all sorts of other fun things. Wouldn't be a problem if they didn't also become rather exclusive. They've invited my mom out with them numerous times, and every time she comes back home Mom will complain about how she became the third wheel; she ended up almost never saying much because the other two were so absorbed in hanging out with each other.
So imagine, now, that these two women want to get together in Vegas. And imagine, also, that my mom will be going and will likely be brunted again.
And don't forget that this would all be going on during a trip planned initially for my birthday.
I've already told Mom that it's starting to not feel like a trip for my birthday, and rather a girl's weekend that I'm invited to because I'll be turning 21 and can finally get in the bars with them instead of having to wait outside.
I think I'm finally starting to feel selfish about this trip
