I totally think it's Ned. He's so girly. Plus the already killed Maude, so it must be their fav family to fuck with
Edit: wait, I went to the site and looked at next weeks episode and it said this:
?Milhouse Doesn?t Live Here Anymore?
When Milhouse and his mother move away to Capitol City he reinvents himself. Milhouse comes out of his shell on ?The Simpsons? Sunday, August 1 8pm/7c.
So my guess is that it's Milhouse!