3 Players all-in on flop, what's your move ?

[Legend]

I just sat down in a 1-2 NL, $200 max buy-in, on-line, 10 players at the table. The table appeared to be loose but I was not familiar with the players. I doubled up in one
of the first hands and had about $400 when the following hand came out:

EP (with $48) called from an early position, I held K(h)K(s) and raised
from a late position to $10. The button (with $93) called. SB (with $230)
called. BB called and EP called.

5 players see the flop. Pot size pre-flop = $50

The flop came:

Q(d) 8(c) 6 (c)

SB bet $32
BB folded
EP moved $38 all-in

At this point I put SB on AQ as I believed he would have checked a stronger hand.
The EP all-in could be a flush draw or a made hand, but since he was on a short stack I wasn't concerned about him as I was getting good odds to call.

My main concern was the SB player who bet into 4 players and had a big
stack. I was also concerned I may be beat because 5 player saw the
flop. I decided SB was weak and raised to $100 hoping to isolate the
all-in player and basically saying SB that I have an over pair.

Unexpectedly the button came from nowhere and moved $83 all-in.
The action was back to SB who moved all-in as well!

$202 in the main pot.
$135 in side pot A (with SB & Button).
$154 in side pot B (with SB).

$120 to call.

1) What's you move ?
2) Would you play the hand differently ?