KK river decision

Easy check behind?

Party Poker
No Limit Holdem Ring game
Blinds: $0.50/$1
9 players
Converter

Stack sizes:
UTG: $96.35
UTG+1: $117.50
MP1: $98.80
Hero: $98.50
MP3: $74
CO: $289.68
Button: $104.84
SB: $41.30
BB: $55.90

Pre-flop: (9 players) Hero is MP2 with K:club: K:diamond:
2 folds, MP1 calls, Hero raises to $4, MP3 folds, CO calls, 3 folds, MP1 calls.

Flop: 2:heart: 2:spade: 4:diamond: ($13.5, 3 players)
MP1 bets $8, Hero calls, CO folds.

Turn: 5:spade: ($29.5, 2 players)
MP1 bets $10, Hero raises to $30, MP1 calls.

River: A:spade: ($89.5, 2 players)
MP1 checks, Hero.....?
Results:
Final pot: $89.5

Any reads? W/O a read I check behind every time.

good place to check behind. getting to SD here without a river bet is good IMO. i think there is a good chance villain has a PP 66-QQ, and it looks good on that board until the river, but i still check behind here on the chance villain had a 2/3/A2-5soooted.

you got a free showdown so take it.
You beat an awful lot that played the hand like this.