UTG is 20/12 over 61 hands; MP is 43/12 over 248 hands; CO is 57/13 over 65 hands. I kind of feel this would be a semi-decent spot to two-way bet having UTG fold out most of his PP and AQ with one of the donks either folding or calling with worse while IP. How bad is this?

Full Tilt No-Limit Hold'em, $0.50 BB (6 handed) - Full-Tilt Converter Tool from FlopTurnRiver.com

UTG ($52.75)
MP ($256.90)
CO ($69.25)
Hero (Button) ($71.05)
SB ($69.85)
BB ($100)

Preflop: Hero is Button with A, J
UTG raises to $2, MP calls $2, CO calls $2, Hero raises to $11, 3 folds, MP calls $9, 1 fold

Flop: ($26.75) J, K, 7 (2 players)
MP checks, Hero checks

Turn: ($26.75) 10 (2 players)
MP checks, Hero checks

River: ($26.75) 6 (2 players)
MP checks, Hero bets $11

MP folds 67% to cbets btw. Aggression = 2.6. I'm sure postflop is wtfbad. I was just trying to gain value on the river. Do we bet flop or turn? If we bet on any of the streets, how large should we make it?