$4 NLHE 6-max: How was this played?

A fish with vpip over 60 opens early and a better player with around 25/20 flat calles and this gives me the oppurtunity to iso raise the fish. The regualar calles as well so its 3 handed.

Was my flop bet too big. I think I just wanted to see where I was and not give a free card to anyone with one heart. And by the river I was comitted so I called. Was this ok?

PartyGaming - $0.04 NL (6 max) - Holdem - 6 players
Hand converted by PokerTracker 3
SB: $4.00
BB: $9.65
UTG: $2.63
MP: $1.82
CO: $4.00
Hero (BTN): $5.29
SB posts SB $0.02, BB posts BB $0.04
Pre Flop: ($0.06) Hero has A♠ Q♠
UTG raises to $0.16, fold, CO calls $0.16, Hero raises to $0.56, fold, fold, UTG calls $0.40, CO calls $0.40
Flop: ($1.74, 3 players) Q♥ T♥ 3♥
UTG checks, CO checks, Hero bets $1.66, fold, CO calls $1.66
Turn: ($5.06, 2 players) 5♥
CO checks, Hero checks
River: ($5.06, 2 players) K♣
CO bets $1.78 and is all-in, Hero calls $1.78

I dont mind betting a lot on the flop, it means if no heart comes you can put him in on the turn. When the heart comes I would shut down. Definitely fold the river.

I'd say it's a fold.

He's probably calling this flop with underpairs + a heart, AQ & KQ. All of these beat you other than AQ which probably checks anyway and has you beat 1/3 of the time. As sick as the odds are this is a fold.

hands played fine up until then btw. The fish is always our priority so I don't mind the large bet and the 3bet is solid assuming the fish isn;t a 60/2 or something.