Who sold out Annalise on HTGAWM

This week on How to Get Away With Murder, someone will finally sell out Annalise (Viola Davis) in the future timeline. Who do you think, was it: someone from Keating 5, Simon or even her ex Nate. Although someone will betray her, she may have a new ally in [that person is....]President Harding (Lauren Valez). Valez tells TVGuide.com: "Their relationship has been pretty contentious and there's a huge moment between them that kind of changes the direction of their relationship a little bit, There are things that you can assume about her and her journey to becoming president of the university, and this secret will tell you more about why she is the way she is."

Who's the one that sold out Annalise, ONTD?

Viewing/Discussion post: S3E7 - Call It Mother's Intuition