Welcome to our forum.
It sounds like you have a wonderful relationship with D, and have settled comfortably into polyamory. It always makes me happy to hear stories such as yours. And four wonderful daughters; I'm sure they keep you busy!
Hope you will enjoy your time on this site, meet new friends here, read and post and benefit from it. It is great to have you onboard.
Love means never having to say, "Put down that meat cleaver!"