Should I laydown this set of 6's?

[Vee Quiva]

$33 sit n go at Party.
15-30 blinds.
9 players left.

I am 3 off the button so middle position.

I am dealt 6 /images/graemlins/club.gif6 /images/graemlins/heart.gif
UTG calls 30 (450 starting chips)
UTG +1 calls 30 (590 starting chips)
I call 30 (775 starting chips)
Late Position calls 30 (1045 starting chips)
Small blind completes for 15 (1760 starting chips)
BB checks (670 starting chips)

Flop is 2 /images/graemlins/club.gif A /images/graemlins/spade.gif 6 /images/graemlins/spade.gif

SB checks, BB bets 75, UTG folds, UTG+1 calls 75, I call 75, last two players fold.
405 in pot. 3 players to the turn.

Turn is 8 /images/graemlins/spade.gif

BB goes all in for 565. UTG + 1 goes all in for 485.

What do you do?

I realize it was risky not to play the set harder on the flop with 2 spades on board. I was hoping to double up and this particular time I decided to slow play. This is not my normal course of action.

My reads are vague at this point because it's still early in the tournament but they both appeared to be loose players but not particularly aggressive.

[RobGW]

Your pic just got me in trouble at work... Fold...

[Vee Quiva]

Was your boss looking over your shoulder?

[RobGW]

Well he doesn't usually do that but my head bobbing up and down probably drew attention. Anyways I think a raise on the flop is the best line but since you didn't it becomes a pure pot odds problem. And you don't have the odds to continue.