Okay, the one extra sentence Lena suggested I think was a good one and I added it just now. Thank you, Lena.
And I agree that if you went on the assumption that the BFF COULD be a Good Friend of another heir and you do not have time to change things without messing up your Dynasty, fine. You get a free pass. But, now everyone is clear, so from this point on in anyone's Dynasty - please have all future heirs follow the new friends rule that any heir's BFF is totally off limits for other Heirs.
Thanks, and Happy Thanksgiving everyone.