She felt the hand touch her back. In the span of only a few seconds, she had a variety of thoughts. Her habitual nature said to move away, he didn't need to be touching her. But an impulsive instinct said to just leave it be.

She decided to split the difference and merely ignored the fact that he was touching her after only knowing her for five minutes. It was probably best to not make herself look weak in front of him. So she let it go and just let him guide her along.