It may be a factor. The aunt was a teen living in the same household with her sister, nephew and nieces.
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 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.
