"I once suggested it to George as the only way we could top Vader being my father. I envisioned her as a double-agent working clandestinely for the Rebels. SPOILER ALERT: He didn't like my idea.
Then there was the time I pitched Boba Fett as Luke's mother. I have always been more than willing to generously share my many, many terrible ideas in the off-chance we might stumble across one that could actually be useful. At the time, I didn't even know Leia was my sister."
Why actors shouldn't write their stories, everybody.