Just as Ben had predicted, Mary was very hurt in the wake of Sam's rejection. She somehow expected that touching her son would make everything better again, and when it didn't, the rejection combined with pregnancy hormones made her tear up quickly.
Mary listened as Ben growled and grumbled at Sam, too tired and sad to get on to him for his use of language. When he said it was time to go, Mary wordlessly complied. She didn't feel up to arguing with Sam anymore right now, maybe later, but for now...now she wanted to lay down and sleep for a year.