If Pamela were born today, she'd probably get the label of functionally autistic. Since she was born a while ago, she got to grow up and have a reasonably normal life. She even said in the prior episode that she didn't really understand children, who are totally emotional. Pamela I think, doesn't have much of an emotional sense, so she doesn't get that emotional rebound we get when we hurt someone else. This has probably made her strong in some ways and inadequate in others.