help me, I'm lost with pocket 9's

[lerxst337]

I felt comfortable with everyone at the table, we've been playing for an hour plus.

UTG is a total donk 76/1.6/0.54
MP1 61/32/2.12 I've been looking to isolate, but haven't the last few orbits.
MP2 29/9/1.38 Seemed passive against any aggression, I don't remember him 3 betting the player on his right, despite the fact that MP1 was raising a third of the hands.

Comments on all streets are appreciated. I wanted to isolate MP1, but with the cold-call in front of me, I just called. I raised on the flop figuring MP2 just had overs--or else he would have raised with top pair--, and knowing that MP1 would continuation pretty much anything. Donk does what a donk does on the river--should I vomit or raise?

Ultimate Bet 3/6 Hold'em (Kill) (8 handed) FTR converter on zerodivide.cx

Preflop: Hero is CO with 9[img]/images/graemlins/diamond.gif[/img], 9[img]/images/graemlins/spade.gif[/img].
UTG calls, <font color="#666666">1 fold</font>, <font color="#CC3333">MP1 raises</font>, MP2 calls, Hero calls, <font color="#666666">2 folds</font>, BB calls, UTG calls.

Flop: (10.33 SB) 4[img]/images/graemlins/diamond.gif[/img], J[img]/images/graemlins/heart.gif[/img], 8[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(5 players)</font>
BB checks, UTG checks, <font color="#CC3333">MP1 bets</font>, MP2 calls, <font color="#CC3333">Hero raises</font>, BB folds, UTG calls, MP1 calls, MP2 calls.

Turn: (9.16 BB) J[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(4 players)</font>
UTG checks, MP1 checks, MP2 checks, <font color="#CC3333">Hero bets</font>, UTG calls, MP1 folds, MP2 folds.

River: (11.16 BB) J[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">UTG bets</font>, Hero ???