Just an fyi, if your husband and D are having sex, then it's a triad. If they're each only having sex with you, it's a vee. There's a glossary around here somewhere.
Congrats on your new bundle of joy, and your happy whatever you are!
I say I'm in a vee that is a sort of an emotional triad. My boys love each other a lot, but they're not going to sexual anytime soon. We also have this us-that-is-three, in addition to our clear dyads.