dimed out Tom to Jeri (tom n jeri ha!) in the last episode, about wanting to go public.

Greg's not comfortable in his skin or with his family standing but he also knows Tom is a bully weirdo who will gladly throw him under the bus. It's a trip because Tom is so insecure around the core family, so he tries to pick on the other outsiders. He tried to go at that Wila girl as she was walking in the bathroom.