You might want to phrase that differently, Superboy. She is your sister. Even though she can't possibly be your sister, because you don't have one, and that's Lana Lang, the redhead girlfriend from your early days. So, no.
You have to pity Dad here, watching as his son - who really isn't from his loins at all, but fell out of the sky somehow - usurps the traditional role of the patriarch, cutting and distributing the Thanksgiving bounty with greater skill and efficiency than the old man could ever muster.
Meanwhile, Mom looks on, not buying this "sister" bit at all. Stay away from my boy. Oh I know what you're up to. I know.