Rachel want to marry Marshal and she want to tell her mother "Dorothy" about the news, Marshal gets nervous and remember a flashback of her being young and Dorothy only giving him 5 minutes to talk to her.
He slaps her thinking she is Dorothy.
Could the pa's of Marshal be his biological daughter? Is that why he chose them to be his personal assistants once they were 18? Blackhearts Games are know for this kinda of plotlines