When aggressive button calls the weak turn bet with two clubs out, he tells me he doesn't have the 9. When aggressor checks the river, he tells me he can't call either. On the other hand, passive weak 9 is believable for me, with a lot of fold equity against everything besides a pair of eights.

Seat 1: monnkey (4,780)
Seat 2: qweens4 (2,385)
Seat 3: daxallin (3,395)
Seat 4: T-Rex 56 (1,685)
Seat 5: Frank_1958 (2,605)
Seat 7: SVTKrafty (1,865)
Seat 8: Rondavu (3,540)
Frank_1958 posts the small blind of 60
SVTKrafty posts the big blind of 120
The button is in seat #4
*** HOLE CARDS ***
Dealt to Rondavu [Kh Ac]
Rondavu calls 120
monnkey folds
qweens4 folds
daxallin folds
T-Rex 56 calls 120
Frank_1958 calls 60
SVTKrafty checks
*** FLOP *** [3c 4s 9c]
Frank_1958 bets 120
SVTKrafty folds
Rondavu calls 120
T-Rex 56 calls 120
*** TURN *** [3c 4s 9c] [8h]
Frank_1958 bets 120
Rondavu calls 120
T-Rex 56 calls 120
*** RIVER *** [3c 4s 9c 8h] [9h]
Frank_1958 checks
Rondavu has 15 seconds left to act
Rondavu bets 960
T-Rex 56 folds
Frank_1958 folds
Uncalled bet of 960 returned to Rondavu
Rondavu shows [Kh Ac] (a pair of Nines)
Rondavu wins the pot (1,200)
*** SUMMARY ***
Total pot 1,200 | Rake 0
Board: [3c 4s 9c 8h 9h]
Seat 1: monnkey didn't bet (folded)
Seat 2: qweens4 didn't bet (folded)
Seat 3: daxallin didn't bet (folded)
Seat 4: T-Rex 56 (button) folded on the River
Seat 5: Frank_1958 (small blind) folded on the River
Seat 7: SVTKrafty (big blind) folded on the Flop
Seat 8: Rondavu collected (1,200)