TT vs an insta-raisor

[SamIAm]

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

MP1 is a little aggressive preflop and passive postflop. An interesting thing is that he had "raise-any-in-turn" clicked preflop. He re-raised me in half a second; I think the computer did that for him. (I don't know how strong those sorts of reads are. Do you believe in internet-tells?)

Preflop: SamIAm is UTG+2 with T[img]/images/graemlins/spade.gif[/img], T[img]/images/graemlins/club.gif[/img].
<font color="#666666">2 folds</font>, <font color="#CC3333">SamIAm raises</font>, <font color="#CC3333">MP1 3-bets</font>, <font color="#666666">6 folds</font>, SamIAm calls.

Flop: (7.40 SB) 2[img]/images/graemlins/diamond.gif[/img], 8[img]/images/graemlins/spade.gif[/img], 8[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
SamIAm checks, <font color="#CC3333">MP1 bets</font>, <font color="#CC3333">SamIAm raises</font>, MP1 calls.

Turn: (5.70 BB) 4[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">SamIAm bets</font>, MP1 calls.

River: (7.70 BB) J[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
SamIAm ...

On the flop, I wanted to charge AQs and stuff. When he doesn't 3bet me, I still worry that he might have an overpair, but I still think I need to follow-through on the turn with the bet. What should I do if he raises me on the turn? Believe him and fold, or face the turn?

Then the river comes over-card AND flush-card. Not so cool, but better than an A. Should I bet-out? What happens if he raises? Should I check, showing weakness after betting the whole way?

Thanks for any comments.
-Sam