Ak vs a TAGy like player

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Full Tilt Poker - No Limit Hold'em Cash Game - $0.50/$1 Blinds - 4 Players - (LegoPoker Hand History Converter)

Hero (SB): $112.75
BB: $110.75
UTG: $109.40
BTN: $113.45

Reads: <font color="blue">villian is 17/13/2.4 over 700+ hands. we have s history where he stacked off with A8 on a ATx board. i had raised that flop and bet big on the turn, yet he wouldnt let go.

anyways, i 'think' hes the type who could have AQ here a decent amount.</font>

Preflop: Hero is dealt K[img]/images/graemlins/spade.gif[/img] A[img]/images/graemlins/spade.gif[/img] (4 Players)
<font color="red">UTG raises to $3.50</font>, BTN folds, <font color="red">Hero raises to $12.50</font>, BB folds, UTG calls $9.00

Flop: ($26) A[img]/images/graemlins/diamond.gif[/img] T[img]/images/graemlins/spade.gif[/img] 2[img]/images/graemlins/heart.gif[/img] (2 Players)
<font color="red">Hero bets $18.00</font>, UTG calls $18.00

Turn: ($62) 6[img]/images/graemlins/heart.gif[/img] (2 Players)
Hero checks, UTG checks

River: ($62) 3[img]/images/graemlins/diamond.gif[/img] (2 Players)
<font color="red">Hero bets $30.00</font>, <font color="red">UTG raises all-in to $78.90</font>

does my turn check allow me to fold here? i am a little lost...i 'felt' i was beat by a set here, however i may have created a quandry by just not betting the turn.