The concept of non-evil Stepmom was recently investigated by my daughter.
MEGGAN: Daddy, who is your girlfriend?
ME: I don’t have one, sweetie.
MEGGAN: Can I be your girlfriend?
ME: Nope. You’re my daughter. That’s a hundred times more special.
MEGGAN: yay (hugs me)
ME: Yes, sweetie.
MEGGAN: Would you marry Jill?
ME: No. She’s your childminder. And I don’t like her.
MEGGAN: Neither do I.
ME: So why should I marry her?
MEGGAN: She would be an evil Stepmother.
ME: Do you want an evil Stepmother?
ME: I know a couple of girls I’d like to marry.
MEGGAN: Do you like to kiss them
ME: *laughs* I’ve never kissed them. I just like them. They’re nice.
MEGGAN: But they can’t be a Stepmother.
ME: Why not?
MEGGAN: because they’re GOOD…
ME: Oh. Okay. Yes. Makes perfect sense.