Molly thought it was incredibly sweet and touching that Tasha would something like that to defend her. But, Molly had trouble expressing her feelings like that, having developed a hard shell AGES ago in order to survive the barrage of foster homes.
In the Slayer's experience, Tricia's was surprisingly one of the nicer homes Molly had lived in. Molly shrugged again, "Eh. . .I'm used to it and its better for the younger kids that Tricia takes her issues out on me than on them. They can't take a beating, I can."