NL50: JJ, 1 card to str8 and 3 suited on board, rivered set - bet?

[UncleGogi]

UTG: ($50.30 in chips)
CO: ($46.95 in chips)
BTN: UncleGogi ($115.45 in chips)
SB: ($56.45 in chips)
BB: ($78.80 in chips)

Dealt to UncleGogi J/images/graemlins/heart.gif J/images/graemlins/club.gif

ANTES/BLINDS
SB posts blind ($0.25), BBposts blind ($0.50).

PRE-FLOP
UTG folds, CO calls $0.50, UncleGogi bets $2.50, SB calls $2.25, BB folds, CO calls $2.

FLOP 6/images/graemlins/diamond.gif 7/images/graemlins/diamond.gif 3/images/graemlins/club.gif
SB checks, CO checks, UncleGogi bets $7, SB calls $7, CO calls $7.

TURN 4/images/graemlins/diamond.gif
SB checks, CO checks, UncleGogi checks.

RIVER J/images/graemlins/spade.gif
SB checks, CO checks, UncleGogi checks.

SB is 47/16/1 during 89 hands.
CO is 47/0.6/2.3 during 154 hands.

Turn card was a disaster, so i was sure i should check turn, but shall i bet on that river?

[Lego05]

Yes bet river...they both checked to you twice....unlikeyl they have a better hand......fold if they check raise you.

[Khaos4k]

Bet about 1/2 pot. Fold to a CR. If they bluff that it's ballsy as hell and therefore unlikely. But you might get calls from some 2 pair hands.

[UncleGogi]

I've just been scared by possible c/r that i checked river.
They showed me K7 and K9...