I promptly answered 2, it have been the default answer for 29 years (my younger brother is 29 yo, my sis is 31 and I'm... older
), but then I proceeded to read the posts of everyone else and realized I actually forgot the 2 years old half-brother that I have now o.o
I'm not sure how troublesome it is, considering that he actually calls me "aunt" and we barely see each other.