100 Max 99 on low board

[xwowsersx]

Villain seems pretty donkalicious. Don't have a ton of hands on him but he's playing 41/6. Whats the best line here?

Poker Stars, $1/$2 NL Hold'em Cash Game, 6 Players
LegoPoker Hand History Converter

SB: $142.25
BB: $212.65
Hero (UTG): $219
MP: $56.10
CO: $211.80
BTN: $258.90

Pre-Flop: 9[img]/images/graemlins/spade.gif[/img] 9[img]/images/graemlins/diamond.gif[/img] dealt to Hero (UTG)
<font color="red">Hero raises to $8</font>, 2 folds, BTN calls $8, SB folds, BB calls $6

Flop: ($25) 3[img]/images/graemlins/diamond.gif[/img] 7[img]/images/graemlins/spade.gif[/img] 8[img]/images/graemlins/spade.gif[/img] (3 Players)
BB checks, <font color="red">Hero bets $18</font>, <font color="red">BTN raises to $36</font>, BB folds, Hero calls $18

Turn: ($97) 8[img]/images/graemlins/diamond.gif[/img] (2 Players)
Hero checks, <font color="red">BTN bets $18</font> Hero ... ?

[Nick Royale]

I'm likely calling the turn and re-ev river.