The Vampire Diaries Sneak Peek: What Does Lily Know?

What does Lily know about Stefan? She reveals a critical piece of information in this clip from The Vampire Diaries.
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The Vampire Diaries Season 7 Episode 3 Teaser

What is the deal with that stone?!? We may start to get an idea on The Vampire Diaries Season 7 Episode 3, as teased here.
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The Vampire Diaries Season 7 Episode 3 Quotes

You can take my town, destroy my house, but you will not touch my car.

Stefan [to Lily]

Damon: So, who's up for a little old fashioned hostage swap?
Alaric: Does agreeing to go mean you putting on pants?