66 for baby flush - bet this river?

[Akimka]

MP2 8.4/5.26/passive AF
button 36/10/agressive AF

Two questions: value bet this river?
And - what to do on flop if button bet?

Party Poker 2/4 Hold'em (10 handed) converter (http://www.selachian.com/tools/bisonconverter/hhconverter.cgi)

Preflop: Hero is UTG+2 with 6/images/graemlins/club.gif, 6/images/graemlins/diamond.gif.
<font color="#666666">2 folds</font>, Hero calls, <font color="#666666">1 fold</font>, <font color="#CC3333">MP2 raises</font>, <font color="#666666">2 folds</font>, <font color="#CC3333">Button 3-bets</font>, <font color="#666666">2 folds</font>, Hero calls, MP2 calls.

Flop: (10.50 SB) 8/images/graemlins/diamond.gif, Q/images/graemlins/diamond.gif, 5/images/graemlins/diamond.gif <font color="#0000FF">(3 players)</font>
Hero checks, MP2 checks, Button checks.

Turn: (5.25 BB) 4/images/graemlins/diamond.gif <font color="#0000FF">(3 players)</font>
<font color="#CC3333">Hero bets</font>, MP2 folds, <font color="#CC3333">Button raises</font>, Hero calls.

River: (9.25 BB) 7/images/graemlins/spade.gif <font color="#0000FF">(2 players)</font>
Hero checks, Button checks.

Final Pot: 9.25 BB

[Paxosmotic]

I think villain just value raised his flush on the turn, so this should be an easy check/call since we're not folding and not beating any reasonable flush. (Said without noting villain's river play, which we'd have no way of knowing)

[tyler_cracker]

Fold when it's 2 back to you preflop. Your 6s aren't looking very good against two raising opponents (especially when MP2 is so passive), and you're not getting overlay to try and hit your set.

I like the turn bet, but i think you need to check/call the river. A worse hand isn't calling after you stop-n-go, and a better hand (which button could easily have) will raise again, and we would like to show down our hand.