Choosing a baby name is a tough decision, and we’ve all heard stories about women who are upset when their name has been “stolen.” While we don’t necessarily condone someone using a name their sibling has already “claimed,” certainly there are extenuating circumstances.

Enter the saga of adult twins, and some next-level pettiness. This woman took to Reddit to vent about her twin sister, referred to in the post as “S,” and the audacity she’s shown in using the baby name she’d picked out for her future daughter. The catch? Her twin is unable to conceive naturally, and will be adopting a 5-year-old girl, who (obviously) already carries the name.

The poster says she thinks it’s “fantastic” that her twin and her husband are going to adopt, but there’s a caveat:

I’m currently pregnant and having a girl. My husband and I spent a lot of time picking out the perfect name for our future child. I feel SO good about this name.

Yesterday, S and SH announced to the family (remotely) that they are officially about to adopt a little girl. They wanted a baby but ended up having to go with a slightly older kid, 5. She looks absolutely precious and I was so happy for a few seconds before they announced her name is B, the name that S KNOWS is my daughter’s.

Whoa, hold up. Your twin sister is adopting a little girl after struggling with infertility, giving an older child a chance to live in a loving home, and your pressing concern is the child’s name? But wait, there’s more!

The poster attempts to justify her cattiness by stating she and her twin have rhyming names, and she doesn’t want their daughters to be mocked like they were as children. Of course, the girls’ problems would stem exclusively from their names, and not from the underlying rivalry between their mother and aunt.

I feel like all of my problems with S will repeat themselves as everyone compares the girls and lumps them together because they have the same name. They won’t be able to have a good relationship because of this. I don’t want people nicknaming my kid to distinguish her because I like the FULL name I chose. And I can’t help but suspect that S picked a kid with the same name on purpose just like she always wanted to be like me when we were kids.

Don’t worry — the pregnant twin has a perfectly reasonable solution! Since she picked the name first, and because people change adopted children’s names “all the time,” she thinks the right call would be for her twin to do the same. Or, you know, to change her mind about the adoption altogether.

If the kid won’t change her name, S and SH could go with a different kid. There are thousands upon thousands of orphans who need loving homes and 99.9999% of them don’t have this one particular name. They haven’t bonded with this one yet. I already have bonded with my baby and I can’t imagine her with another name.

Ultimately, this poster wants the answer to the burning question: AITA? We have a feeling we know your answers, but please do sound off in the comments!