Can I fold this? which street?

[Roy6]

Is it standard to 3-bet the flop? I thought MP2 comes along with us anyway, so it's not a big mistake and at least I know where I stand.
Turn I don't like. I have no backdoor draw and probably drawing to 3 outs (if he has Ax two pairs) or I'm drawing dead (against a set). To make it even worse, with a Q, MP2 might just outdraw me.
So can I find a fold on the turn?
River is a clear fold although the pot is very big?

Party Poker 3/6 Hold'em (8 handed) converter

Preflop: Hero is CO with Q[img]/images/graemlins/heart.gif[/img], A[img]/images/graemlins/heart.gif[/img].
UTG calls, UTG+1 calls, <font color="#666666">1 fold</font>, MP2 calls, <font color="#CC3333">Hero raises</font>, Button calls, <font color="#666666">2 folds</font>, UTG calls, UTG+1 calls, MP2 calls.

Flop: (11.33 SB) A[img]/images/graemlins/club.gif[/img], 9[img]/images/graemlins/heart.gif[/img], 8[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(5 players)</font>
UTG checks, UTG+1 checks, MP2 checks, <font color="#CC3333">Hero bets</font>, <font color="#CC3333">Button raises</font>, UTG folds, UTG+1 folds, MP2 calls, <font color="#CC3333">Hero 3-bets</font>, <font color="#CC3333">Button caps</font>, MP2 calls, Hero calls.

Turn: (11.66 BB) K[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(3 players)</font>
MP2 checks, Hero checks, <font color="#CC3333">Button bets</font>, MP2 calls, Hero calls.

River: (14.66 BB) 4[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(3 players)</font>
MP2 checks, Hero checks, <font color="#CC3333">Button bets</font>, MP2 folds, Hero ...