100nl with KK

[Sorcerer808]

Villain is 31/9/1.7/25.5WTSD

I just got caught 2barreling

Party Poker - No Limit Hold'em Cash Game - $0.50/$1 Blinds - 5 Players - (LegoPoker Hand History Converter)

SB: $144.62
BB: $99.00
UTG: $23.44
Hero (CO): $100.00
BTN: $98.86

Preflop: Hero is dealt K[img]/images/graemlins/club.gif[/img] K[img]/images/graemlins/diamond.gif[/img] (5 Players)
UTG folds, <font color="red">Hero raises to $4.00</font>, 2 folds, BB calls $3.00

Flop: ($8.50) 8[img]/images/graemlins/diamond.gif[/img] J[img]/images/graemlins/heart.gif[/img] 3[img]/images/graemlins/heart.gif[/img] (2 Players)
BB checks, <font color="red">Hero bets $6.00</font>, BB calls $6.00

Turn: ($20.50) 3[img]/images/graemlins/spade.gif[/img] (2 Players)
BB checks, <font color="red">Hero bets $16.00</font>, BB calls $16.00

River: ($52.50) A[img]/images/graemlins/spade.gif[/img] (2 Players)
BB checks, Hero checks

Pot Size: $52.50 ($2 Rake)

Should I bet this river for some more value?