She did prefer he take her home himself. But at the same time, she was beginning to not trust herself around him. If he took her back to her house, she would want to invite him in. And she wouldn't want him to leave. And where would that leave them? Moving too fast, that's where.
"I'll call you as soon as I get in," she assured him. "You need to get home yourself, commissioner." She touched his cheek, rubbing gently with her thumb. "So don't stay here and work all night. Go get some rest."