the second oldest is 26 right now, so if she winds up being closer to 27/28 with birthdates, we could always go that route? they’re a family of 4, three girls and one boy, born to two doctors who weren’t around very much because they were fairly renowned in their respective fields. the kids were left with nannies and sitters a lot, so the kids really wound up raising themselves/looking after each other as best kids could.