NL 50 AK utg. my river call was 100% correct, no?

[Keyser112]

Full Tilt No-Limit Hold'em, $0.50 BB (9 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

CO ($11.40)
Button ($49.60)
SB ($47.50)
BB ($10)
Hero ($39.75)
UTG+1 ($20.50)
MP1 ($46.50)
MP2 ($15.05)
MP3 ($25.30)

Preflop: Hero is UTG with A[img]/images/graemlins/club.gif[/img], K[img]/images/graemlins/diamond.gif[/img].
<font color="#CC3333">Hero raises to $1.75</font>, <font color="#666666">6 folds</font>, SB calls $1.50, <font color="#666666">1 fold</font>.

Flop: ($4) 5[img]/images/graemlins/diamond.gif[/img], T[img]/images/graemlins/spade.gif[/img], 2[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
SB checks, Hero checks.

Turn: ($4) A[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
SB checks, <font color="#CC3333">Hero bets $4</font>, SB calls $4.

River: ($12) J[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">SB bets $4.5</font>, Hero calls $4.50.

Final Pot: $21

[CazicT]

Sure, river is fine.

Any reason for not taking a stab on the flop?

[Keyser112]

[ QUOTE ]
Sure, river is fine.

Any reason for not taking a stab on the flop?

[/ QUOTE ]

i was utg, and got a call, i figured villain would be worried about a c/r and would only bet a made hand