SPOILER ALERT
As played, I have no idea what MP3 had. I raised the turn. MP3 called that bet. I bet into MP3 on the river and they folded. I collected the pot without a fight.
Not that this changes anything. The wrong play can work sometimes but would be -EV in the long run. But I do not believe this was the wrong move. With this board, 99 has too much value to fold and reraising gives greater EV than just calling down, IMNSHO.