This happened shortly after Oliver started to be hypnotized into going back to Mrs. Tabby's house and Oliver's mom found out.
Oliver's mom went alone to Mrs. Tabby's house. Oliver may have been at school or with the other Junior Revengers, but he was not there and not in trouble.
Oliver's mom asked Mrs. Tabby to tell her what exactly had happened on Halloween with Oliver, his little friends, and the Revengers.
I can imagine Mrs. Tabby would say something like "One of your son's little friend asked for food in a rude way, so Gertie and I decided that they need a lesson, so Gertie and I started removing his and your son's clothes when another one of his little friends started hitting Gertie with his sword which caused her to let the boy she was dealing with slip away. We attempted to go after them when all of a sudden these superheros showed up and took Gertie, Marlene and I away."
Both characters are by