50nl set on mono board - do we want to play for stacks?

[bored]

MP is 40/15/1.3 and is on my buddy list.

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

SB: $37.30
BB: $47.20
UTG: $54.05
MP: $41.30
CO: $168.00
Hero (BTN): $89.90

Preflop: Hero is dealt 8[img]/images/graemlins/spade.gif[/img] 8[img]/images/graemlins/diamond.gif[/img] (6 Players)
UTG folds, <font color="red">MP raises to $2.00</font>, CO folds, Hero calls $2.00, 2 folds

Flop: ($4.75) 8[img]/images/graemlins/club.gif[/img] K[img]/images/graemlins/club.gif[/img] 7[img]/images/graemlins/club.gif[/img] (2 Players)
<font color="red">MP bets $4.75</font>, Hero calls $4.75

Turn: ($14.25) 6[img]/images/graemlins/diamond.gif[/img] (2 Players)
<font color="red">MP bets $20.00</font> Hero?

I put him on AA/KK/AK, a flush, or A[img]/images/graemlins/club.gif[/img]x. He might even
have 77. I don't think he'd play T9 like this.

Calling is pointless due to stack sizes, so should I shove or fold? Should I have shoved the flop? Reraised preflop?