Did I play this right?

I'm not sure how to approach this. I don't want to scare anyone away who doesn't have an A on the flop and there are no draws. Best to give a free card/hope the button takes a stab or bluffs at it?
The turn bet let me know he really doesn't have anything. I'm not sure I could have squeezed much more from either player here.

Only had about 150 hands on the button. He seemed slightly loose and bad, a little overly aggressive-- 33/5/1.6; MP1 was very loose/passive and called really bad hands down too much-- TPNK, 2nd, bottom pair, etc over the 40 hands I observed him-- 84/0/0.8. I was almost sure the turn c/r was too strong and would scare them both off (glad I was wrong on that). I'm not sure they call more than that C/R, though. Thoughts?

Full Tilt Poker
Pot Limit Holdem Ring game
Blinds: $0.05/$0.10
9 players
Converter

Stack sizes:
UTG: $17.90
UTG+1: $3.80
MP1: $10.15
MP2: $5.30
Hero: $11.35
CO: $5.05
Button: $10.20
SB: $0.65
BB: $9.25

Pre-flop: (9 players) Hero is MP3 with 2 2
2 folds, MP1 calls, MP2 folds, Hero calls, CO folds, Button calls, SB folds, BB checks.

Flop: A 2 6 ($0.45, 4 players)
BB checks, MP1 checks, Hero checks, Button bets $0.45, BB folds, MP1 calls, Hero calls.

Turn: Q ($1.8, 3 players)
MP1 checks, Hero checks, Button bets $0.5, MP1 calls, Hero raises to $1.7, Button calls, MP1 calls.

River: 8 ($6.9, 3 players)
MP1 checks, Hero bets $3.45, 2 folds.
Uncalled bets: $3.45 returned to Hero.

Results:
Final pot: $6.9

Pot the flop, Pot the turn, 2/3 the river.

Or, C/r the flop. Look how small the pot is on the turn and we have a set. You have to trap Ax here. As far as the river goes I think $3.45 gets paid just as much as $5-6 so I don't see any reason not to bet more on the end.