She nods and puts the half soggy biscuit down on the saucer as she listens to him. Her expression goes from one of concern to one of complete horror.

"Jesus..."

She's stunned. If Sherlock was five, that would have made his sister 6, maybe 7. How is a child capable of something like that?

Molly's hand covers his and holds on. It's unfathomable to her, that type of trauma at that age - enough that he apparently had blocked it entirely. What an awful thing to go through as a child.