I would totally send her a polite email saying you understand her decision to go with a half day program, BUT defending your day home, and your program, and tell her that you're sorry that you didn't get to tell her all that you offer in your brief interview with her. I do not think that this is a strange thing to do, given the accusation.
I couldn't and wouldn't let that go...
I agree with the idea of the follow up e-mail. And then end by wishing her all the best.
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