BvsB Turned a combo and strange betting from complete donk

[HustlerLA]

Villain is 59/9/.9 and obv. quite horrible.
Did I butcher this hand really bad? I am assuming my turn is bad, I planned to get him to fold a 7, with the weak donk bet, should have I just called and gotten the draw cheaply? Is this a fold anywhere before the river?

Full Tilt Poker No-Limit Hold'em, $4 BB (3 handed) Hand History converter Courtesy of PokerZion.com

saw flop|<font color="#C00000">saw showdown</font>

Hero ($586.35)
<font color="#C00000">BB ($632.30)</font>
Button ($92)

Preflop: Hero is SB with 6[img]/images/graemlins/spade.gif[/img], 5[img]/images/graemlins/spade.gif[/img].
<font color="#666666">1 fold</font>, <font color="#CC3333">Hero raises to $12</font>, BB calls $8.

Flop: ($24) 8[img]/images/graemlins/diamond.gif[/img], 2[img]/images/graemlins/heart.gif[/img], 7[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets $18</font>, <font color="#CC3333">BB raises to $36</font>, Hero calls $18.

Turn: ($96) 8[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks, <font color="#CC3333">BB bets $25</font>, <font color="#CC3333">Hero raises to $85</font>, <font color="#CC3333">BB raises to $145</font>, Hero calls $60.

River: ($386) T[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks, <font color="#CC3333">BB bets $125</font>, Hero folds.

Final Pot: $511