Now was no time to be a crybaby, not when she was trying to make a good impression. That might sound strange for the mom in the situation, but this mom was still a teen, a teen who had just lost her parents and made a deal with a demon. Impressing Sam's girlfriend now was important for later, when she had to tell them. Which she did. Things had happened, and they needed to know why.
Mary carried both their plates to the table, taking a seat as she set them on the table. She gave Heather a smile subtly tinted with apology. She knew her voice had given her away.