What better reason to have another?

Me:
Are you going to be a good big sister and help tuck your brother/sister in?
Daughter:
(smile)
Wife:
Will you sing her Twinkle, Twinkle Little Star?
Daughter:
No
Wife:
Will you kiss her goodnight?
Daughter:
No
Me:
Will you punch her in the face?
Daughter:
Yeah......I punch her in the face.