AK, re-raised pot, facing turn c/r

-No real reads on villain in this hand, he was new to the table, only have about 9 hands logged on him.
-The turn check by villain seemed fishy, so I decided to check through (thinking he had AA, AQ or QQ and is trying to trap)
-decide to fire on turn, but get check raised, so is it safe to assume he has one of the above hands? fold or push?

Cryptologic
No Limit Holdem Ring game
Blinds: $0.50/$1
6 players
Converter

Stack sizes:
UTG: $71.50
Hero: $101.50
CO: $133.50
Button: $87.25
SB: $80
BB: $132.25

Pre-flop: (6 players) Hero is UTG+1 with
UTG folds, Hero raises to $4, 2 folds, SB raises to $10, BB folds, Hero calls.

Flop: ($21, 2 players)
SB checks, Hero checks.

Turn: ($21, 2 players)
SB checks, Hero bets $14.75, SB raises to $42, Hero??

Fold.

Fold, the rest of the money is going in on the river, and you're only beating a bluff.

Is there a better line I should take in this spot? A flop bet, or another check through on the turn, and call his lead out on the river? (turn check through: since if figured to be wa/wb on the flop, so i'm probably still wa/wb on the turn)

Fold. I like your line.