No read so far (just played a few hands b4)

Full Tilt Poker
Limit Holdem Ring game
Limit: $0.50/$1
6 players
Converter

Stack sizes:
hero: $41.45
UTG+1: $29.50
CO: $2.50
Button: $28.75
SB: $20.15
BB: $16.40

Pre-flop: (6 players) hero is UTG with J J
hero raises, UTG+1 folds, CO 3-bets, Button folds, SB calls, BB folds, hero caps, CO calls, SB calls.

Flop: K Q 9 (13SB, 3 players)
SB bets, hero raises, CO calls all-in $0.5, SB 3-bets, hero calls.

Turn: 5 (10BB, 2 players + 1 all-in - Main pot: 8BB, Sidepot 1: 2BB)
SB bets, hero calls.

River: 3 (12BB, 2 players + 1 all-in - Main pot: 8BB, Sidepot 1: 4BB)
SB bets, hero calls.

Results:
Final pot: 14BB
SB showed 5s Ks
hero mucks Jd Js
CO mucks 2d Ah

I don't give CO much credit, since he's gonna be all-in.
SB cold calls his 3bet => that's a warning, but maybe that was for the same reason.

Flop is quite bad and SB donks. What does it mean ?
- trying a "weak" sumi bluff with small PP, an ace or a gutshot ? maybe
- hope I will raise to shut out the other player ? No, cause he's already almost alli n
- "strong" semi-bluff with 2 spades ? Why not, that would explain his preflop call (maybe SC)
- a queen or a 9 ? maybe
- a king ? definitely many hands he would have cold-called preflop.
- JT ? why not waiting for the C/R ?

I thought his 3bets narrows his range to a K or 2 spades.
I think a can peel the flop (6 outs and a BDFD) but should I give up on the turn ?
I think I should.

River was a clear fold.

Just call the flop. As played you have to call the turn. The river is an easy fold.

Call flop and turn, fold river UI. Flopraise is a spew...

Flop raise accomplishes nothing. The chance you are ahead is slim to none. Just peel flop and turn. You prob have about 5-6 outs. Yes, the SB can have a FD or maybe an idiot w/ a 9 but you have to beat the all-in player behind you. Does not look good, you need to hit.

You lit a dollar bill on fire on the flop and then another on the river.

your hand is awful on the flop, why are you trying to build a bigger pot?