Out of line or standard?

[asdf1234]

First hand at table, no previous information on this opponent.

Party Poker 2/4 Hold'em (10 handed) converter

Preflop: Hero is BB with 3[img]/images/graemlins/spade.gif[/img], J[img]/images/graemlins/spade.gif[/img].
UTG folds, UTG+1 folds, UTG+2 folds, MP1 calls, MP2 folds, MP3 folds, CO calls, Button calls, SB folds, Hero checks.

Flop: (4.50 SB) 3[img]/images/graemlins/diamond.gif[/img], 6[img]/images/graemlins/spade.gif[/img], 8[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(4 players)</font>
<font color="#CC3333">Hero bets</font>, MP1 folds, <font color="#CC3333">CO raises</font>, Button folds, <font color="#CC3333">Hero 3-bets</font>, CO calls.

Turn: (5.25 BB) A[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets</font>, CO calls.

River: (7.25 BB) A[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets</font>, CO calls.

Final Pot: 9.25 BB

LAGgy or OK?

[Avatar]

I think I'm check/folding the river.
The turn bet is ok but you have to give up after he calls it. If he calls with his 8x when there is 1 ace, he will definately call when there is two.

Pot is not that big..check/fold.