How to play American Airlines

The table is loose and passive with occasional bursts of anger. Villain seems like the best player of the bunch, but nothing spectacular. Hero is probably perceived as LAG by the table, although I doubt they adjust their play. Forgive any inaccuracy as this is from memory and there is no hand history available.

This is 4-handed NL50. Hero is in the SB with ~60$, Villain in CO covers. What's the best line here? Push the turn? Push the river?

Preflop: Hero is SB with A [img]/images/graemlins/diamond.gif[/img] A [img]/images/graemlins/heart.gif[/img]
UTG calls, CO calls, Hero raises to 2.5$, everyone calls.

Flop: ($10) K [img]/images/graemlins/club.gif[/img], Q [img]/images/graemlins/club.gif[/img], 2 [img]/images/graemlins/spade.gif[/img]. (4 players)
Hero bets 9$, BB folds, UTG calls, CO calls.

Turn: ($37) 5 [img]/images/graemlins/spade.gif[/img].(3 players)
Hero bets 22$, UTG folds, CO calls.

River: ($81) K [img]/images/graemlins/diamond.gif[/img]. (2 players)
Hero checks, CO goes All-In. Hero feels sick.

Hero has ~25$ left.