15/30 lame pair + GS - +EV peel?

[donger]

The PFR in this hand is seriously fishy. The game insta-broke the minute he left. He's like 84/22/.9 or something and occasionally does weird and really awful stuff postflop like raising JTo UTG then trying to ram it home on a A55-Q-7 board. He also cold called 3 bets with 64o from a utg & utg+1 raise-reraise. BB is a little too passive preflop and a little fishy, but def more aggro than UTG. Should I venture past the turn here? Is preflop OK?

Absolute Poker
Limit Holdem Ring game
Limit: $15/$30
6 players
Converter

Pre-flop: (6 players) Donger is SB with 5[img]/images/graemlins/diamond.gif[/img] 6[img]/images/graemlins/diamond.gif[/img]
<font color="#cc0000">UTG raises</font>, 3 folds, Donger calls, BB calls.

Flop: 6[img]/images/graemlins/spade.gif[/img] K[img]/images/graemlins/diamond.gif[/img] 8[img]/images/graemlins/spade.gif[/img] (6SB, 3 players)
Donger checks, <font color="#cc0000">BB bets</font>, UTG calls, Donger calls.

Turn: 4[img]/images/graemlins/heart.gif[/img] (4.5BB, 3 players)
Donger checks, <font color="#cc0000">BB bets</font>, UTG calls, Donger ??.

***********************

Hypothetical: We call and the river is

River: 5[img]/images/graemlins/heart.gif[/img] (7.5BB, 3 players)
Donger ???