Discord is a little…possessive. he's kind of paranoid, especially when it comes to his relationship with Twilight. so he unconsciously tried to keep her to himself for a while. but he toned it down upon realizing that she was basically isolated from everyone. it's a phase of protection that neither him or Twilight like to acknowledge.
EDIT: Now that I look at it, Twilight looks a little too small in this image. I'll try to keep that in mind. XD
Spike, Twilight Sparkle, and Discord belong to Hasbro
Art belongs to me
Twicord is a blessing to everyone
Hope ya'll enjoy