Well, for what it's worth, you're always welcome here from my point of view.
K's actions are understandable, even if I can't condone them. As for your husband, I am sorry to hear he is unable to accept you as having a polyamorous nature. Maybe someday his outlook will change, we can always hope.
You have some tough decisions on the road ahead, I don't envy you. Willing to help in any way I can.
Love means never having to say, "Put down that meat cleaver!"