I can't figure out how to get Samantha to join the Home Harem. Minami, Sasha, and Bree have all accepted it. However the little quest marker says "call Samantha to talk about the home situation" but no madder how many times I call her or what options I select, it never prompts the next quest.
I also can't figure out how to initiate a threesome, when they're all in the same room for dinner and I try to initiate it I only get the options for just minami, or just the other two girls or a combo thereof.