It’s been a very long time since Brianna had allowed her sissy son out of chastity. Her sissy is allowed a release once a season. Mother decides its finally time. She unlocks her sissy’s chastity and strokes her. Brianna’s “daughter” wears a corset and stockings. That is her uniform. Mother will milk all the pent-up filth from her girl, then lock her right back up. While milking, Mother quizzes her sissy on the proper care of lingerie and other household tasks in line with her new gender. Brianna tells her sissy that her orgasm will be ruined, and she will be forced to eat her emission. The milking is just routine maintenance. She should not attempt to derive any sexual pleasure from it, and everything should be as quick and neat as possible. Mommy’s girl spills and her orgasm is ruined. The sissy is being trained to never associate her orgasm with pleasure, only with hygiene and seasonal release. Brianna feeds her sissy cum from Mother’s fingers. She reminds her “daughter” that she must do this for her date on prom night as well.