NL200 - KK huge river bet

[happyhour456]

SB unknown, very first hand at the table, seems aggrs

Party Poker - No Limit Hold'em Cash Game - $1/$2 Blinds - 5 Players - (LegoPoker HH Converter)

SB: $287.60
Hero (BB): $255.20
UTG: $220.45
CO: $136.12
BTN: $153.95

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">CO raises to $4.00</font>, BTN folds, SB calls $3.00, <font color="red">Hero raises to $15.00</font>, CO calls $11.00, SB calls $11.00

Flop: ($45) 3[img]/images/graemlins/heart.gif[/img] 4[img]/images/graemlins/diamond.gif[/img] 5[img]/images/graemlins/heart.gif[/img] (3 Players)
SB checks, <font color="red">Hero bets $35.00</font>, CO folds, SB calls $35.00

Turn: ($115) T[img]/images/graemlins/spade.gif[/img] (2 Players)
SB checks, Hero checks

River: ($115) 2[img]/images/graemlins/club.gif[/img] (2 Players)
<font color="red">SB bets $120.00</font>, Hero ???

meine gedanken in weiß:
<font color="white">nachdem ich mir die hand nochmal angeschaut habe, bin ich mir ziemlich sicher, dass man hier den turn betten muss. eure gedanken bitte</font>