$100 NLHE 6-max: Did I play this OK?

I don't have the stats on this guy but he was playing a lot of pots and was pretty aggro. Any comments on how this hand was played?

Grabbed by Poker Training Software
NL Holdem $1(BB) Replayer
Hero ($112)
BB ($94.87)
UTG ($99.45)
CO ($98.50)
BTN ($363)

Dealt to Hero 9:diamond: 9:spade:

fold, CO raises to $3, fold, Hero calls $2.50, fold

FLOP ($7) 9:heart: J:diamond: J:spade:

Hero checks, CO bets $4, Hero raises to $12, CO calls $8

TURN ($31) 9:heart: J:diamond: J:spade: Q:spade:

Hero bets $15, CO calls $15

RIVER ($61) 9:heart: J:diamond: J:spade: Q:spade: K:spade:

Hero bets $31, CO raises to $68.50 (AI), Hero calls $37.50

I think I might lean towards 3betting pre.

As played bet turn more

i think it's perfectly fine as played.

Agree with bgomez, bet turn more to allow for a river shove that is not an overbet.

Why were you betting so small on turn and river after he called your flop c/r?

You're right. Should have bet bigger on the turn. Villain had pocket kings.

betting bigger on turn seems good, but result doesn't matter - you bet bigger because he will call bigger with kk and is more likely to sigh call any river