Where are Mom and Zoe?

Jon felt very wrong as he rematerialized outside of his school, but thankfully no one else was around to see what had gone wrong. He looked down to see two disproportionate breasts hanging from his chest, one large and slightly saggy, the other small and obviously still developing. One hand was his own but the other hand was feminine with black nail polish. His own shirt was pushed out by his new breasts, but he was wearing the same black miniskirt as Zoe. A quick check inside Zoe's panties showed that he still had his penis, but under it was a vagina. He shuddered wondering which of them it belonged to. His long legs were his sister's, her small feet encased in her black heeled boots he had trouble standing up in. His face felt odd and he definitely had more hair than usual, but there were no mirrors around to check what had happened.