NL 10, Multiway nutflush draw on flop

Overplay or standard? I'll need about 25% fold equity to make this play profitable. Do I have it?

Hand converted with online PokerStrategy.com hand converter:

Play hand

$0.05/$0.1 No-Limit Hold'em (6 handed)

Known players:
[tg]MP2$12.69:///////;MP3$9.95:///////;CO$12.47:///////;BU$8.08:///////;SB$5.89:///////;BB (Hero)$9.55:///////;[/tg]

Preflop: Hero is BB with 5:s, A:s.
MP2 raises to $0.35, MP3 calls $0.35, 3 folds, Hero calls $0.25.

Flop: ($1.1) 6:d, 3:s, 8:s (3 players)
Hero checks, MP2 bets $0.71, MP3 raises to $2.22, Hero raises to $9.20, MP2 folds, MP3 raises to $9.60.

Turn: ($20.61) 6:c (2 players)

River: ($20.61) T:d (2 players)

Final Pot: $20.61.
Results follow:

MP3 shows a full-house, eights full of sixes(8:h 8:d).
Hero shows a pair of sixes(5:s A:s).

MP3 wins with a full-house, eights full of sixes(8:h 8:d).