1/2 NL Prima poker

I have $260
opponent has $100.
I don't have a read on the oppoent..


Bunch of limpers to me in the CO with [Qh]. I limp as well..button calls..blinds do their thing.

FLOP $12
[Jh][3d]

UTG bets $2. Folded to me I raise to $12. Only UTG calls.

TURN $36
[Jh][3d][6h]

UTG bets $8???? I think and think...don't know what to do..I have a feeling I'm probably beaten. But it could be a blocking bet. I decide to play it fast here and check the river. I raise to $24. UTG thinks and calls.

RIVER
[Jh][3d][6h][3c]

UTG checks, I checks.

UTG shows [Ks] and takes the pot.

Anyone fold to the turn here? My play was aggressive but I really was unsure if i was winning or not. Apparently so was teh kings down. at least i confused him.