KJ overplayed??

Hand converted with online PokerStrategy.com hand converter:

Play hand

$0.01/$0.02 No-Limit Hold'em (9 handed)

Known players:
[tg]SB$1.48:///////;BB (Hero)$2.88:///////;UTG1$1.47:///////;UTG2$2.05:///////;MP1$1.21:///////;MP2$1.85:///////;MP3$3.88:///////;CO$1.52:///////;BU$5.46:///////;[/tg]

Preflop: Hero is BB with J:h, K:d.
3 folds, MP2 calls $0.02, MP3 folds, CO calls $0.02, 2 folds, Hero checks.

Flop: ($0.07) 9:c, T:c, J:d (3 players)
Hero bets $0.06, MP2 calls $0.06, CO calls $0.06.

Turn: ($0.25) 5:d (3 players)
Hero bets $0.20, MP2 calls $0.20, CO calls $0.20.

River: ($0.85) 3:h (3 players)
Hero bets $0.40, MP2 raises to $0.90, CO raises to $1.24(All-In), Hero folds, MP2 calls $0.34.

Final Pot: $3.73.
Results follow:

MP2 shows a straight, king high(Q:d K:h).
CO shows a pair of jacks(A:c J:c).

MP2 wins with a straight, king high(Q:d K:h).

MP2=31/4, CO=44/6;