Okay, for people who are having trouble with adding Samantha to the home harem.
1 - Samantha needs to be okay with you seeing other women. This means she needs to have maxed out love, high kink points and you being honest with her.
2 - Obviously, the home harem needs to be in place.
3 - Talk to Sasha and Bree about Samantha. As in actually go up to each woman, click the talk topic and hit the Samantha icon. And yes, I'm being that specific because some of you are that dumb.
4 - Call Samantha. I don't know what room triggers this, it happened for me in the bathroom.
5 - Enjoy your foursome.