^ i saw some avril/alli pix. do they not hang anymore?

how is it possible that in the Britney fandom it is uncertain whether someone is her cousin or not? I just find that baffling considering how big her fanbase it/was she looks like she could be related imo. I don't see how they are all over each other in those pix. not at all. those pix could be cousin pix. some cousins are very close are good friends w/one another. soo..Alli isn't a cousin?