Could I be in an uglier spot with an overpair?

[Harv72b]

A hand I played earlier today. UTG has respectable TAG numbers over a decent sample size, but my notes on him say that he has real problems folding his PFR hands postflop. MP3 is unknown and joined the table less than orbit prior.

Party Poker 5/10 Hold'em (10 handed) converter

Preflop: Hero is BB with K[img]/images/graemlins/heart.gif[/img], K[img]/images/graemlins/club.gif[/img].
<font color="#CC3333">UTG raises</font>, <font color="#666666">4 folds</font>, <font color="#CC3333">MP3 3-bets</font>, <font color="#666666">3 folds</font>, <font color="#CC3333">Hero caps</font>, UTG calls, MP3 calls.

Flop: (12.40 SB) J[img]/images/graemlins/club.gif[/img], Q[img]/images/graemlins/heart.gif[/img], T[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(3 players)</font>

Okay, smart guys....what's our street by street plan on this one?

I mean, besides backdooring a royal flush. [img]/images/graemlins/tongue.gif[/img]