Okay, so maybe Damon hasn't known this entire time.
At the end of last night's polarizing Vampire Diaries episode, Caroline and Stefan had an epiphany: Elena is totally sired to Damon! That explains everything!
They arrived at this conclusion, of course, just as Delena was finally coming to fruition (if you know what we mean!), leading to one very awkward conversation on next week's flashback-heavy "We'll Always Have Bourbon Street."
Watch now as Stefan tries to convince Damon of the spell he has Elena under:
Sound off, TV Fanatics: Elena being sired to Damon is...