Online $1 $2. 6max. 

Hero: sb $400

Villain: UTG $450

UTG limps, Btn limps, I raise to $10 With AdKsQd3s.

Bb calls, UTG pots to $42. Btn calls, I call, Bb calls.

Flop: ($168) (4 players)  AcKd8d.

I chk, bb chks, UTG bets $145, btn folds, on us?

So....  Call? Fold? Push?

Villain is reg. but not that good. He is on the tighter side, but will overplay his hands sometimes.