Fastplay or slowplay this, and if so -- how?

[private joker]

UTG is a solid TAG. In over 700 hands, he's about 16/12/2. MP3 is a fish.

I think the flop and turn are interesting here, and maybe the river; I didn't expect MP3 to wake up with so much aggression, so I decided to check both streets. It was hard to figure when to reveal my strength, since I think the TAG was targeting MP3 with a big hand like AA/AK/KQ. Then again, the fish could have any junky 2 pair here, so what does TAG have? Do I give credit for KK? I can't see how TT is a logical holding for either opponent. Also, on the river do I checkraise because MP3 had the last aggression? I decided to bet out because it would suck to have it checked through. Also, if raised, do I slow down? 65s and KK have me, as does the very unlikely TT.

Party Poker 5/10 Hold'em (9 handed) converter

Preflop: Hero is BB with 7[img]/images/graemlins/club.gif[/img], 7[img]/images/graemlins/diamond.gif[/img].
<font color="#CC3333">UTG raises</font>, <font color="#666666">3 folds</font>, MP3 calls, CO calls, <font color="#666666">1 fold</font>, SB calls, Hero calls.

Flop: (10 SB) K[img]/images/graemlins/spade.gif[/img], 7[img]/images/graemlins/heart.gif[/img], 4[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(5 players)</font>
SB checks, Hero checks, <font color="#CC3333">UTG bets</font>, <font color="#CC3333">MP3 raises</font>, CO folds, SB folds, Hero calls, <font color="#CC3333">UTG 3-bets</font>, <font color="#CC3333">MP3 caps</font>, Hero calls, UTG calls.

Turn: (11 BB) T[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(3 players)</font>
Hero checks, <font color="#CC3333">UTG bets</font>, <font color="#CC3333">MP3 raises</font>, <font color="#CC3333">Hero 3-bets</font>, UTG calls, <font color="#CC3333">MP3 caps</font>, Hero calls, UTG calls.

River: (23 BB) 3[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(3 players)</font>
<font color="#CC3333">Hero bets</font>...