Damon was alerted when he felt Talia's emotions fluctuating.
He knew that Talia was worried about Marcy and George. She was kind and selfless, and her impulse was to help people, but this was not the right time.
Damon feared that she will use her powers.
What if someone sees how amazing she is? With all the things going on, he really didn't want to add more to it.
He gave her hand a squeeze. "Don't do anything rashly. It's still early to give up hope."
Talia responded with a sad smile. She could feel Damon's worry, and she wanted to assure him that she won't act without thinking.
"I will do my part by providing herbs and food. The two of you continue without me. I will check on Dawn." With that, Talia left the living room.