The person in question also looks like she’s in her early 20’s. She had a chronic condition where she was basically in a waking coma but wasn’t “experiencing” stuff for a decade so it’s as if time had jumped from her POV because she has no memories of that period.
This gap is so disorienting for her that she identifies her age as 22. Being told her actual birth year causes confusion and distress, as it clashes with her sense of time and personal experience.
Like the saying goes, ‘beauty is in the eye of the beholder’ to which I would add, so is the creepiness.
My thoughts is that unless you are one of the adult person concerned, their age (like their gender, religion, skin color, and so on) is none of your business.
Adults spend time with whomever they fancy. That’s why they’re legally adults: they’re considered old enough to be responsible for their own actions and decisions. They don’t need your (or anyone else, not even mine) permission.
I mean, are you some kind of moral police on a crusade to force people to only spend time with people born the same year? If you are I would suggest you focus you next crusade on a much more worrying issue than their age, which is: the way they spell Supercalifragilisticexpialidocious. That, we will all agree, is the surest way to spot creeps.