I don't think that the killings are done yet, either. Jade is still going to go after Gwen. She has it in for Gwen, she wants Will all to herself and will not stop at anything until she gets what she wants.
After reading someones post about the masks being different. I agree with them! I believe Jade has her own and is the one that attacked Gwen at the house when Casey was there to help Gwen pack up and leave Will. Gwen has never been attacked by Eve, it was Jade all along attacking Gwen. Actually I would say, she is torturing Gwen. When she is ready to snap and really loose it, Gwen better watch her back! Jade wants Will..no one will get in her way. Time to get rid of Jade already!!