[nikkianni]

Actually, I don't see anything wrong with what you said in the original post. Not what your DH wrote, but what you actually typed to us.
Having a new baby is all consuming and when we were late with our first letter, that's what I told DD's bparents.
I think I said something like, "Our lives have been crazy and wonderful these last few months. We've been learning to do the best job in the world and it's worth the lack of sleep, spit up, etc."
I'm paraphrasing because it's been awhile, but we were just honest. We were happy and sleep deprived and happy and up to our elbows in diapers, and happy....you get the idea.