A change of pace for me

MP2 looks a little fishy, but not much of a read yet.
Button looks pretty darn fishy.

PokerStars No-Limit Hold'em, $1.00 BB (9 handed) FTR converter on zerodivide.cx

UTG+1 ($177.10)
MP1 ($98.40)
MP2 ($56.90)
MP3 ($126.75)
CO ($91.95)
Button ($98.50)
Fnord ($137.60)
BB ($86.20)
UTG ($120.45)

Preflop: Fnord is SB with J, A.
3 folds, MP2 raises to $3, 2 folds, Button calls $3, Fnord calls $2.50, 1 fold.

Flop: ($10) Q, 3, 8 (3 players)
Fnord checks, MP2 bets $3, Button calls $3, Fnord calls $3.

Turn: ($19) 2 (3 players)
Fnord checks, MP2 checks, Button bets $5, Fnord calls $5, MP2 calls $5.

River: ($34) A (3 players)
Fnord bets $15...

Well they certainly gave you simple reasons to call down with the nut draw...

MP2 didn't hit the flop, or he hit it really hard and is slow playing. Initial thought tells me AK, but with him hanging on after the turn, He's probably on some type of a draw here. I'll put him on QQ (horribly played), JJ, TT, AK (also horribly played), KJ, JT as his BEST POSSIBLE hands... I hesitate to speculate further without more info about his "fishiness", ie VP$IP, would he raise with AT? KT? 99? 88? 44?! I'm guessing he's beat on the river, or he'll raise and tell you that you are beat.

The fishy Button has an 8 or 3. Hand range for him 78o+, 34s+, 22+ He played a suited (or unsuited) connector in position and caught a piece. His bet signifies he doesn't want to get too involved, but he doesn't want a nothing pot if the river checks around again... sounds fishy enough to me.

I like the river bet. But, I'm not sure that worse hands will call here... The A is a scare card for anyone already holding a pair, and it didn't complete any draws (except 54), so you gotta hope that they think you're bluffing here. MP2 is most likely folding unless he beats you, and the Button could call with his middle pair...

Nobody else have an opinion on this one??