Flopped Trips - did I screw this one up???

[Angelic_Ace]

Party Poker No-Limit Hold'em Tourney, Big Blind is t15 (9 handed) converter

MP2 (t770)
MP3 (t1235)
CO (t795)
Button (t740)
SB (t790)
Hero (t770)
UTG (t1685)
UTG+1 (t580)
MP1 (t635)

Preflop: Hero is BB with J[img]/images/graemlins/heart.gif[/img], 8[img]/images/graemlins/heart.gif[/img].
<font color="#666666">1 fold</font>, UTG+1 calls t15, <font color="#CC3333">MP1 raises to t30</font>, MP2 calls t30, <font color="#666666">4 folds</font>, Hero calls t15, UTG+1 calls t15.

Flop: (t127.50) 7[img]/images/graemlins/spade.gif[/img], J[img]/images/graemlins/diamond.gif[/img], J[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(4 players)</font>
Hero checks, UTG+1 checks, MP1 checks, MP2 checks.

Turn: (t127.50) 2[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(4 players)</font>
Hero checks, <font color="#CC3333">UTG+1 bets t50</font>, MP1 folds, MP2 calls t50, Hero calls t50.

River: (t277.50) 9[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(3 players)</font>
Hero checks, <font color="#CC3333">UTG+1 bets t50</font>, <font color="#CC3333">MP2 raises to t150</font>, <font color="#CC3333">Hero raises to t250</font>, MP2 folds, Hero calls t250.

Final Pot: t977.50

Results in white below: <font color="#FFFFFF">
Hero has Jh 8h (three of a kind, jacks).
UTG+1 has 2c 2h (full house, twos full of jacks).
Outcome: UTG+1 wins t977.50. </font>

MP2 had pocket Aces by the way... should I have definitely bet the flop in first position? If UTG+1 had'nt made a set post - flop, I would have stood to make a nice sum off of the AA by slowplaying it.