Unusual hand on stars

[Prevaricator]

I wasn't involved in this pot, but the action that occured is very strange. Neither of the players showed their hands, but what do you think they had? MP3 I know to be a tight good player, and I have no read on MP2. Particularly the turn and river plays are confusing. Its very unlikely that MP2 had the flush since the A /images/graemlins/spade.gif
is on the board and he reraised the utg raiser.

PokerStars No-Limit Hold'em, $2 BB (9 handed)

UTG+1 ($$130.30)
MP1 ($$268.55)
MP2 ($$231.45)
MP3 ($$196.20)
CO ($$375.60)
Hero ($$197.70)
SB ($$72)
BB ($$185.85)
UTG ($$27.65)

Preflop: Hero is Button with 8/images/graemlins/heart.gif, A/images/graemlins/heart.gif.
UTG raises to $4, UTG+1 folds, MP1 calls $4, MP2 raises to $12, MP3 calls $12, CO folds, Hero folds, SB folds, BB folds, UTG calls $8, MP1 folds.

Flop: ($43) A/images/graemlins/spade.gif, 3/images/graemlins/club.gif, 4/images/graemlins/spade.gif <font color="blue">(3 players) </font>
UTG checks, MP2 bets $12, MP3 calls $12, UTG folds.

Turn: ($67) 8/images/graemlins/spade.gif <font color="blue">(2 players) </font>
MP2 bets $20, MP3 raises to $50, MP2 calls for time. MP2 $30.

River: ($167) 6/images/graemlins/club.gif <font color="blue">(2 players) </font>
MP2 bets $64, MP3 folds.

Final Pot: $231