[ClaytonN]

UTG has 60k
Button has 22k
Hero (SB)have 25k
BB has 40k

Notes:
-UTG has been fairly loose and passive preflop but aggressive postflop. Could be construed as fishy as the hands he's shown down were marginal hands that hit huge
-Table is playing tight and aggressive for the most part
-Button has been pretty inactive
-BB has been playing tight and passive

Blinds 400-800
-UTG calls the 800
-Button makes it 3k
-Hero looks down at AKo in the SB

What's the play?