Newbie hand, huge hand, huge pot

[Bremen]

Party Poker (10 handed)

Sorry about this, converter puked. I just began playing O/8 seriously so feel free to rip away. Most of my experience is nut peddling so far, but I was curious about the river cap with the 2nd nut. Don't see many three bets to begin with, so I'm not sure what people normally 3-bet with.

Preflop: Hero is MP3 with K[img]/images/graemlins/club.gif[/img], K[img]/images/graemlins/diamond.gif[/img], Q[img]/images/graemlins/spade.gif[/img], J[img]/images/graemlins/diamond.gif[/img].
<font color="#666666">1 fold</font>, UTG calls, 1 folds, UTG+2 calls, MP1 calls, MP2 checks, Hero calls, CO checks, Button raises, everyone calls.

Flop: T[img]/images/graemlins/heart.gif[/img], K[img]/images/graemlins/heart.gif[/img], 8[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(9 players)</font>
SB checks, BB checks, UTG checks, UTG+2 checks, MP1 checks, MP2 bets, Hero calls, CO folds, Button calls, SB calls, BB calls, UTG calls, UTG+2 calls, MP1 folds.

Thinking about this after the fact I have the current nut high, with the nut st8 draw. I assume I should raise at this point?

Turn: 4[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(7 players)</font>
SB checks, BB bets, UTG calls, UTG+2 calls, MP2 raises, Hero 3-bets, Button calls (all-in), SB folds, BB calls, UTG calls, UTG+2 calls, MP2 calls.

River: 4[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(6 players, 1 all-in)</font>
BB checks, UTG bets, UTG+2 folds, MP2 calls, Hero raises, BB calls, UTG 3-bets, MP2, calls, Hero caps, BB calls, UTG calls, MP2 calls.

Final Pot: 22.5BB (sidepot included)