Plan to milk with flopped str8

[Roy6]

UTG is 33/4/0.86

CO is 37/22/1.6
I didn't notice anything special about him. He'll autobet these kind of flops with any 2.

So I just call his bet because the chance they will both fold to a raise is quite big here.

I donked the turn figuring it would be checked through a lot and I might even get some action from an 5 if someone would have it + looks suspicious.

Party Poker 3.00/6.00 Hold'em <font color="#0000FF">(6 handed)</font> link

Preflop: Hero is BB with 3[img]/images/graemlins/diamond.gif[/img], 4[img]/images/graemlins/diamond.gif[/img].
UTG calls, <font color="#666666">1 folds</font>, CO calls, <font color="#666666">2 folds</font>, Hero checks.

Flop: (3.33 SB) 2[img]/images/graemlins/heart.gif[/img], A[img]/images/graemlins/spade.gif[/img], 5[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(3 players)</font>
Hero checks, UTG checks, <font color="#CC3333">CO bets</font>, Hero calls, UTG calls.

Turn: (3.17 BB) 5[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(3 players)</font>
<font color="#CC3333">Hero bets</font>