200NL tight table ADVISE

[OhioSt2k]

tight table. both players have behaved for the last hour

Party Poker No-Limit Hold'em, $ Hero (5 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

Hero ($434.50)
UTG ($244.10)
MP ($298)
Button ($368.80)
SB ($259.25)

Preflop: Hero is BB with K[img]/images/graemlins/club.gif[/img], K[img]/images/graemlins/diamond.gif[/img]. SB posts a blind of $1.
UTG calls $2, <font color="#CC3333">MP raises to $4</font>, <font color="#666666">1 fold</font>, SB (poster) calls $3, <font color="#CC3333">Hero raises to $13</font>, UTG folds, MP calls $11, SB calls $11.

Flop: ($47) 2[img]/images/graemlins/spade.gif[/img], 7[img]/images/graemlins/club.gif[/img], 2[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(3 players)</font>
SB checks, <font color="#CC3333">Hero bets $35</font>, MP calls $35, SB calls $35.

Turn: ($152) 3[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(3 players)</font>

What should hero do ???