Marian knows who Bob is, but she'd never gotten to meet him before. She heard of him through Dot and it was obvious that her focus was on him.

She'd go home. Helplessness, even combined with the want to help, would only get in the way. She didn't know how to help him and it looked like there were people would could and would be able to once they cleared away.

Marian did, before she went to join the others leaving, step up behind Dot and says quietly. "If you need anything--anything--you know where to find me."

Then she walked quietly after the group discussing milkshakes and ice packs, with a strange expression. Though strange seemed normal with everything the day had brought.