Derek's mother, and Emily's mom making pinky promises to one another was so far out of reality that Emily actually had to pinch herself. Just to see if she was imagining things or not. When they had been making their way up the stairs. She had not imagined things going the way that they were currently progressing at all.
Their mothers knew one another.
That was huge.
Derek's mother had said that they did not know each other's last names before their current meeting. But the name Cassandra was not a common one. Emily would have remembered if her mom had ever mentioned it. Even if she'd said Cassie, at least once over the years.