Why did all 3 of Kate's parents (Diane, Sam, and Wayne) lie to Kate and about who her real father is? I mean, why bother telling Kate about Sam Austen at all? It would have been so much simpler for everyone if Kate had grown up a Janssen. Sam Austen was already never around because of his military duties and her mother finally had the man she loved when she married Wayne.

Does it mean that Diane believed in her heart that Wayne was a really bad guy and wanted to give Kate a shot at a decent man for a father?--Even if Kate would hardly ever see Sam? Maybe Diane suspected that Wayne would try to molest Kate and she didn't want Kate to have to think of it as incest? But, then again, if Diane REALLY wanted Kate to have a decent father and she was already lying that Sam was Kate's father, why not give Kate to Sam and keep her the hell away from Wayne forever?

Lostpedia says that Wayne probably doesn't know that Kate is his real daughter, yet it's clear from "What Kate Did" that Sam knew. Why would Diane keep the truth from Wayne but not from Sam?

Hey, how funny is it that Sam and Diane couldn't make it work on Lost. They never could make it work on Cheers either. :-p