Kristen And Snow White Were Apparently Cheating For MONTHS! And Did It All Come Down To Her Jealousy Of Claire From Lost?!

With every revelation, this whole twisted tale of adultery and betrayal just gets worse and worse!

While Kristen Stewart self-proclaimed "fling" with her married Snow White director, Rupert Sanders, has already essentially destroyed her relationship with longterm boyfriend and Twilight co-star Robert Pattinson, the actress STILL has not apparently come forward with the whole truth regarding her indiscretions...as they reportedly started much earlier than either party has admitted!

In fact, according to scorned wife Liberty Ross' brother, Leopold, these two have been going at it for a A WHILE!

He reveals:

It was from the last half of filming and all through post-production, clear into last week. [Liberty] She made some sacrifices for something she thought was worth it, now she knows,... [via Perez Hilton]