User blog comment:CF12/The Show's Most Confusing Moment (Not What You Might Expect)/@comment-5221692-20150607115636

That always bothered me too, ESPECIALLY since Heather winning immunity that day was a complete fluke. She had no way of knowing she'd be safe. There's no reason she should have pulled that scheme off with any feelings of security behind it, since she only received immunity, RANDOM immunity, immediately afterwards.