Bottom set 1/2 NL

[ukpokerplayer]

Sorry for the bad format of the post, I
cant get the converter working.

1/2 NL stacks of hero and villain are about $200, no reads as this is first orbit at table.

I called the flop hoping to get it all in on the turn (figuring him for an overpair). However the ace was a bad card as its very scary for him. How is my line here?

> Game # 514,520,736 starting.
> Dealing Hole Cards
> shorty raised for $4
> hero called for $4
> 2 folds
> ChrisPro raised for $13
> 5 folds
> shorty went all-in for $4.35
> hero called for $9
> Dealing the Flop(6c9c2s)
> hero bet for $16
> villain raised for $50
> hero called for $34
> Dealing the turn(As)
> hero checked
> villain checked
> Dealing the river(3s)
> hero bet for $40
> villain called for $40