Zoom SH - AQo BTN vs CO no 3bet

Preflop
Normally I always 3bet this, but this player was unkown and had such a stacksize that if I 3bet, and he 4bets, I need to call right? And a lot of these shorties are playing very very snug and AQ might not even be ahead against their open range. That's why I just called in position.

Flop
Because he bets so little on the flop it made me think he just has overcards and is trying to prevent me betting more with a small bet. I think he has nothing and I think it needs just a little raise to make him fold, and if he does continue he is likely to be quite strong. These shortstacks usually fold a lot if they have nothing. So I do make a little raise with my overcards. I need roughly 42% fold+hand-equity to justify the raise.

But instead of folding according to my plan, he called, which made me think he has something like a Ten. Overpairs he would re-raise.

Turn
Turn comes an Ace and he checks. I thought he either has AT, or this is such a scarecard form him that he always folds if I bet, so I check back planning to bet the river. Also to induce riverbluffs from him, acting like the Ace is a scarecard for me.

River
But, he leads out half-pot on the river. I am still thinking he has AT here, I would like to bet a bit more myself, but I just call.

PokerStars Zoom, Hold'em No Limit - $0.01/$0.02 - 6 players
Replay this hand on Upswing Poker

UTG: $2.07 (104 bb)
MP: $1.42 (71 bb)
CO: $1.34 (67 bb)
BU (Hero): $4.65 (233 bb)
SB: $2.28 (114 bb)
BB: $2.00 (100 bb)

Pre-Flop: ($0.03) Hero is BTN with A♥ Q♣
2 players fold, CO raises to $0.06, Hero calls $0.06, 2 players fold

Flop: ($0.15) 5♠ T♥ 8♦ (2 players)
CO bets $0.06, Hero raises to $0.15, CO calls $0.09

Turn: ($0.45) A♣ (2 players)
CO checks, Hero checks

River: ($0.45) 3♠ (2 players)
CO bets $0.20, Hero calls $0.20

Total pot: $0.85 (Rake: $0.03)