As Giovanna left his office after a long time, Augustus was completely annoyed by her but he still pretended to be in love with her.
As he had left her while there pre shoot, she had got a doubt against him and he can't let her doubt gets stronger when he is this close to his plan.
The people Monte Carlos had hired, they had tried to rescue Rheena Carlos twice but both times they had failed, at first she felt sick and they had to leave her there as she wasn't in the condition to travel.
And when the second time they made an attempt to rescue her, the most people were killed by them but soon other people came along, it seemed like they had kept more people in guarding Rheena Carlos than they thought.
The people threw all the bodies into the river so they won't get identified and then they left the place before someone could caught them.