Only have a few hands with this guy but he doesn't seem to do very much. Should I fold anywhere here?

Party Poker No-Limit Hold'em, $ BB (9 handed) FTR converter on zerodivide.cx

SB ($97.85)
BB ($100)
UTG ($112.70)
Hero ($100)
MP1 ($99.70)
MP2 ($130.85)
MP3 ($68.70)
CO ($164)
Button ($156.85)

Preflop: Hero is UTG+1 with K, K. SB posts a blind of $0.50.
1 fold, Hero raises to $4, 4 folds, Button calls $4, 2 folds.

Flop: ($9.50) 2, 5, 3 (2 players)
Hero bets $8, Button raises to $20, Hero raises to $50, Button calls $132.85 (All-In), Hero calls $46 (All-In).