KQ flops top pair bd fd. gets check raised

[prodonkey]

Villain is 83/11/2.5

By calling here I'm letting the guy in who probably has nothing, and I'm not committing myself in case the raiser actually has a big hand. Now the donkey check raises, and raiser folds, so I figure this hand is worth half a stack vs a guy like this?

Full Tilt Poker - No Limit Hold'em Cash Game - $0.25/$0.50 Blinds - 6 Players - (LegoPoker HH Converter)

SB: $52.75
BB: $29.45
UTG: $40.65
MP: $51.45
<font color="black">Hero (CO): $89.90</font>
BTN: $49.00

<font color="black">Preflop:</font> Hero is dealt (6 Players)
<font color="red">UTG raises to $1.00</font>, MP folds, Hero calls $1.00, 2 folds, BB calls $0.50

<font color="black">Flop:</font> ($3.25) (3 Players)
BB checks, <font color="red">UTG bets $1.50</font>, Hero calls $1.50, <font color="red">BB raises to $6.00</font>, UTG folds, <font color="red">Hero raises to $22.75</font>, BB calls $16.75