Discord is this in The Nuptialverse. Of special note is the Keeper's comment to Twilight in Families.
"If I told you half the things he wants to do to you once he's free, you'd have nightmares. I mean, even worse than you've been having."
- To put that in perspective, the nightmares Twilight's been having at this point are all about her friends ignoring her when she's in danger, in one case even cheering for her death.