It's one or both of the twins. One lost a tooth. Biting Amabella? Therapist said already that the kids are probably aware; of course they are.

Ed was a seat away from Jane at the play. Not Ed. And the twins obviously are the bullies

Agree!

Perry likely raped Jane. Right?

Amen.
And Collider concurs: But he overlapped in a more serious way at the end of the hour, when he follow the nun (sans habit) to an apartment where, we learn, she performs moonlight abortions.
Read more at http://collider.com/the-kni…

You are correct: the nun is there in plain clothes to give the abortion, hence his interest in her - the penguin sans penguin suit.