After the Canterlot Wedding attack failed. Chrysalis and the Changelings had to retreat but before they did...Chrysalis saw you and instantly felt attached to you. She grabbed you with her hooves and flew away. When they got to the hive. She had you stuck in the green goo. She stared at you for a while...thinking about to keep you all to herself. She turned around.

Queen Chrysalis: "My Changelings. Do not ask about why I have a pony here. But when they wake up. Behave yourselves."

She's a yandere.