Flopped top pair in a multiway hand...

[Yerma]

Last hand I'll post for tonite.

Party 0.5-1, nine-handed

Here are my notes on a couple of the players. (1st line are things I saw preflop, all-caps line are directives to myself on how to play against this player, all the rest are things I saw postflop)

UTG:
any 2 cards,cold calls (87o)
VALUE BET THIS MAN + CALL THIS MAN DOWN
flop calls w/1 overcard
calls down K-high
calls down Q-high multiway?!
river shots w/bp+nk if turn checked thru
flop stabber w/2nd pr +nk multiway on coordinated board
turn shots K-high into dry side pot

CO:
cold calls (JTo,A3o)

Here's the hand.

I have A[img]/images/graemlins/club.gif[/img] J[img]/images/graemlins/club.gif[/img] on the button.
UTG limps, EP limps. Two folds. LP limps, CO limps. I raise. The blinds fold. Everyone calls.

5 to the flop of J[img]/images/graemlins/heart.gif[/img] T[img]/images/graemlins/club.gif[/img] 3[img]/images/graemlins/heart.gif[/img] (11.5 SB).
UTG bets. Everyone calls.

5 to the turn of K[img]/images/graemlins/spade.gif[/img] (8.25 BB)
Checked to CO who bets. What do you do?