Flopping monster against a fish

[Happy Jones]

6 Max 200NL (Im buying in short stacked because im not really properly rolled for 200NL but this table was weak I couldnt help myself)
Seat 1: ($20)
Seat 2: ($47)
Button: Hero ($116)
SB: Villian ($240)
BB: ($198)

Villian is the reason im here hes been playing 90% of his hands preflop and has been very laggy (more loose then aggressive however). Other players are weak too but nothing compared to this guy.

Hero is dealt [Ts, Th]

Seat 1 fold
Seat 2 raises $6
Hero reraises to $20
Villian calls $20
Seat 2 folds

Flop [2s, Td, 8d] (Pot $46)
Villian bets $10
Hero calls

I usually take small bets into a raiser as a sign of weakness and if I had AK in this position Id definitely raise it. Right now Im hoping his betting is going to increase on later rounds.

Turn [2c] (Pot $65)
Villain bets $16
Hero calls

Again a very small bet one I could raise but with a full house im not scared of giving up any free cards and with position Im thinking I can extract another bet on the river hopefully trapping him when I reraise.

River[Jc] ($87)
Villian bets $20
Hero reraise allin to $74

I was hoping he had something and would call me here but this is where I think I went wrong and lost some money should I have just raised a small amount here?

Was this a weak trap against a fish, should I have sprung it sooner?

[Silly String]

If you truly think his bets = weakness you did the right thing by letting your opponent bluff again on the river. He would fold to a raise anywhere.
But you said he's weak and obviously not good(90% V$IP), and yet he is betting, so he must have caught a piece. I raise the turn, and hope he has a 2 or a weak overpair.

[thnwkd]

looks like you gave him every chance to draw out on you(on flop). If you want to get the money in you got to build the pot... so re pop him (40-50ish) on the flop and push turn.

[Happy Jones]

Yea thats what I was thinking about raising the flop. Only with my reraise on the flop hes have to at least put me on an overpair on flop and would drop any bluff. Although if he was drawing I could have made him pay for it.

[johnny_fish]

Raise flop!

[Robert]

Yah, raise flop and the rest of hand plays itself from there.