Playing 3/5 live (9 handed).

Villain (fish) limps utg+1 (stack 900) folds round to hero in CO (stack 1500)

Hero makes it 25 with AdQD.

Fold to BB (lag reg) who makes it 90 (stack 1300)

Vaillian calls and hero calls.

Flop: Ah As 9d. (Pot: 270)

BB check, villain bets 150, hero calls and BB folds.

Turn Ks (pot 570)

Villian bets 260, hero calls.

River 6s (pot 1090)

Villian goes all in (400), hero calls.

... Any thoughts on this hand? Can hero fold at some point in the hand?