NFL Prospect Corey Davis Might Buy Sister Ass Implants with Draft Money

This is the best video of the day -- the sister of top NFL draft prospect Corey Davis says she's SOOOO happy her bro is about to become rich ... and hopes he'll kick her over some cash for ass implants!

Corey's sister, LaToya Davis, is out in Philly with a bunch of proud family members -- and they are PUMPED for the former Western Michigan star ... considered the best WR in the draft.

She makes it very clear she's not expecting a dime from her bro ... but if he's feeling generous, she'll gladly take something new to recline on ... and it ain't a couch.

Seriously, LaToya is awesome -- congrats to the entire family!!!