Poker Stars, $0.05/$0.10 No Limit Omaha Cash, 6 Players
Poker Tools Powered By Holdem Manager - The Ultimate Poker Software Suite. View Hand #37932423

BTN: $30.55 (305.5 bb)
SB: $9.68 (96.8 bb)
Hero (BB): $18.07 (180.7 bb)
UTG: $23.60 (236 bb)
MP: $14.15 (141.5 bb)
CO: $12.33 (123.3 bb)

Preflop: Hero is BB with 9 A 8 2
UTG folds, MP raises to $0.30, CO calls $0.30, 2 folds, Hero calls $0.20

Flop: ($0.95) A J 2 (3 players)
Hero checks, MP bets $0.50, CO calls $0.50, Hero calls $0.50

No need to donk it, no need to raise it. Folding would feel very weak, raising is burning money, so I call.

Turn: ($2.45) A (3 players)
Hero checks, MP bets $1.30, CO calls $1.30, Hero calls $1.30

BOOM! Now I have the second nuts! So I check-call the half-pot bet. Maybe it is too passive and I should check-raise instead? However, in this spot I am either way ahead or drawing dead, so I feel some pot control is in order since I am not convinced that villain(s) will stack off with non-boats here.

River: ($6.35) J (3 players)
Hero checks,

And this I feel is the pivotal part of the hand. With the second jack on board, it reduces the probability of being up against AJ. So I am beat only by AJ and JJ - and this type of double paired board will make it harder to fold AKxx type of hands. On the other hand, having checked two streets and then suddenly betting the second J, it looks a bit as if I am full of **** - like I am supposed to have JJ or what? And I would hate getting raised here.

Not sure what the best course of action is though, until the river I feel the hand plays itself though.