It seems like you are still having the same old problems with your metamours that you had when last you wrote. I haven't re-read your previous thread, but I do feel sad for you that it hasn't been resolved. Why hasn't D stepped up and put the kibosh on this sort of crap from her? Weren't you going to have a group meeting with everyone to talk about this?
Seems to me that D is ineffectual in handling his relationships, and this is really where the problem lies. He is the one having multiple relationships, so he has to learn to manage them better. He should be the one who will not tolerate one gf disrespecting another and letting Ka know in no uncertain terms that she cannot get away with it. Sorry, that is all I can think of right now, as I am really tired at the moment - perhaps I'll write again after re-reading your threads.