KK with flop donk, then scary river (PS .10/.20)

[MoonOrb]

PokerStars 0.10/0.20 Hold'em (10 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

Preflop: Hero is MP2 with K, K.
UTG calls, UTG+1 calls, 1 fold</font>, MP1 raises</font>, Hero 3-bets</font>, 1 fold[/i]</font>, CO calls, 3 folds</font>, UTG calls, UTG+1 calls, MP1 calls.

Flop: (16.50 SB) J, 2, 4 5 players)</font>
UTG checks, UTG+1 bets</font>, MP1 calls, Hero raises</font>, CO calls, UTG calls, UTG+1 3-bets</font>, MP1 calls, Hero caps</font>, CO calls, UTG calls, UTG+1 calls, MP1 calls.

Turn: (18.25 BB) 5 (5 players)</font>
UTG checks, UTG+1 checks, MP1 checks, Hero bets</font>, CO folds, UTG calls, UTG+1 calls, MP1 calls.

River: (22.25 BB) A (4 players)</font>
UTG checks, UTG+1 checks, MP1 checks, Hero?


Any comments, suggestions, or ways to improve playing this?

Thanks.

Edited to note that I didn't have any reads on these players.