Massive Hero fold

[private joker]

I think I need my ass kicked by you guys. I'm getting a gajillion to one on this river with the nut straight. I'm also 99.99996% sure he was on a club draw, since my read is he likes to jam draws on the flop, and the turn action pretty much turned his hand face up IMO.

Still, despite all that, is this fold nevertheless unforgivable since it's an online 6max game?

PokerStars $5/$10 Limit Hold'em - 6 players
Hand Converter Tool from DeucesCracked.com

Preflop: Hero is CO with T[img]/images/graemlins/spade.gif[/img], Q[img]/images/graemlins/club.gif[/img]
UTG folds, MP calls, <font color="#FF0000">Hero raises</font>, Button calls, SB calls, BB calls, MP calls.

Flop: (10.00 SB) 3[img]/images/graemlins/club.gif[/img], J[img]/images/graemlins/heart.gif[/img], 9[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(5 players)</font>
SB checks, <font color="#FF0000">BB bets</font>, MP folds, <font color="#FF0000">Hero raises</font>, Button calls, SB calls, <font color="#FF0000">BB 3-bets</font>, <font color="#FF0000">Hero caps!</font>, Button calls, SB calls, BB calls.

Turn: (13.00 BB) K[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(4 players)</font>
SB checks, BB checks, <font color="#FF0000">Hero bets</font>, <font color="#FF0000">Button raises</font>, SB folds, BB calls, <font color="#FF0000">Hero 3-bets</font>, <font color="#FF0000">Button caps!</font>, BB calls, Hero calls.

River: (25.00 BB) 2[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(3 players)</font>
<font color="#FF0000">BB bets</font>, Hero folds...