How the fcuk should i play these sets to extract more?

Party Poker No-Limit Hold'em, $ BB (10 handed) FTR converter on zerodivide.cx

saw flop|saw showdown

UTG+2 ($59)
MP1 ($97.50)
MP2 ($167.16)
MP3 ($127)
CO ($133.23)
Button ($96.35)
SB ($58.35)
BB ($36.10)
UTG ($70.41)
Hero ($100)

Preflop: Hero is UTG+1 with 9, 9. SB posts a blind of $0.50.
UTG calls $1, Hero calls $1, UTG+2 calls $1, 2 folds, CO raises to $4, 4 folds, Hero calls $3, UTG+2 folds.

Flop: ($11.50) 5, A, 9 (3 players)
Hero checks, CO bets $6, Hero calls $6.

Turn: ($23.50) T (3 players)
Hero bets $10, CO raises to $25, Hero calls $15.

River: ($73.50) 5 (3 players)
Hero bets $40, CO folds.

Final Pot: $113.50

Results in white below:
Hero has 9c 9s (full house, nines full of fives).
MP3 doesn't show.
Outcome: Hero wins $113.50.

Guess he got scared that i had AT. Raise the turn? smaller bet on the river? GIMME SUM.

Check the river. He thinks he's got the best hand with his raise, so you'll get something when he bets it. If you check raise to 40, he might call that as well

Reraise the turn for a minraise..
river try to value bet it