When she was on the brink of getting killed, Tina wanted to drag Coco down with her. She even blurted quite a few secrets. The problem was, she remembered the red exclamation marks when she sent out her voice messages.
That meant she probably still had time. She didn't need to go against Coco permanently. She still had time to patch things up. As for Harvey… To someone like Tina, he seemed too good of a person to be true.
She instantly knew who she should cross between the two. Offending Harve