River Question (1/2 Paradise)

[MycroftX]

What action is correct to take on this river?

The game has about 5 callers on every flop. Loose/passive players, The only player who is really good folded before the flop.

Thanks in advance, I'll be curious to see comparing to what I actually did.

Paradise Poker 1/2 Hold'em (10 handed) FTR converter on zerodivide.cx

Preflop: Hero is Button with A[img]/images/graemlins/diamond.gif[/img], K[img]/images/graemlins/spade.gif[/img].
<font color="blue">1 fold[/i]</font>, UTG+1 calls, <font color="blue">1 fold[/i]</font>, <font color="red">MP1 raises</font>, <font color="blue">2 folds[/i]</font>, CO calls, <font color="red">Hero 3-bets</font>, <font color="blue">1 fold[/i]</font>, BB calls, UTG+1 calls, MP1 calls, CO calls.

Flop: (15.50 SB) T[img]/images/graemlins/diamond.gif[/img], T[img]/images/graemlins/spade.gif[/img], 8[img]/images/graemlins/spade.gif[/img] <font color="red">(5 players)</font>
BB checks, UTG+1 checks, MP1 checks, CO checks, <font color="red">Hero bets</font>, BB calls, UTG+1 calls, MP1 calls, CO calls.

Turn: (10.25 BB) 5[img]/images/graemlins/club.gif[/img] <font color="red">(5 players)</font>
BB checks, UTG+1 checks, MP1 checks, CO checks, Hero checks.

River: (10.25 BB) 5[img]/images/graemlins/diamond.gif[/img] <font color="red">(5 players)</font>
BB checks, UTG+1 checks, MP1 bets, CO calls, <font color="red"> Hero...</font>

Final Pot: 13.25 BB