It's weird but think of it this way- they were both kids when they were in the house together, even though they were bloodline aunt/nephew/niece they were being 'parented' by the same group of adults. Is it weirder than my two teenaged sweethearts becoming super siblings when they aged up? They married afterwards. Soulmates, super siblings.
The flavor text also mentions 'blood or not' I think?
I actually knew a uncle/niece who were in that situation IRL- they were in the house, he was the youngest of 12 and she was the first of his oldest brother's children. They were only a year apart in age- and the niece was the older, from what I can recall. They were both old enough to be my grandparents, but the children of the niece called the uncle their uncle, and their children called him Grandpa, and she explained that they were more like brother and sister than uncle/aunt because they were raised at the same time.
Gamewise, so long as the generational lines are more cut (the aunt never was under the age of YA while there were toddlers/children/teens of her sibling in the same household) then you won't have this happen. I think, technically, I think siblings (where one is a care dependent of another) can have the mother/father--son/daughter buffs too, but I'm not certain. If we can confirm that happens then we can see how much of this was a predetermined interaction, I think.
I haven't experienced this myself, because I haven't had teens living together age up in the same household, but I think it's just a case of awkward naming for this relationship type.
For high relationship and no rivalry, they get "super siblings" because they were as close as siblings in relationship terms. If they had a slightly more neutral friendship bar, they would have got "childhood buds" instead. Or if they were rivals, they'd get "Family Frenemy".
So I don't think any of these are meant to imply they're actually brother and sister, just that their relationships in childhood seemed that way.
@DolphinSSA wrote:
@crinrict Aunt and nephew...siblings?!?!?
If the aunt is closer to age to the children, why not ?
Marking this as unsure for now cause it could very well be intended that way.
