Not sure how to feel, or what to say...

Today is a day I am glad I have a place to come to , where I really do not know any of you in my real life and I can just express! Yesterday was my husbands 38th birthday, him and I went to a movie last night and on the way home we were talking and teasing about 40 being around the corner, and he said, I still hate that we could not have kids of our own. Hubby not being the best with words, and I know that, I just got quite, he said well you know what I mean, not our own, but bio children, out of my genes. Well I just didnt know how to feel, really, in a way I thought we were past this, in a way I felt like Me as the Woman was only suppose to grieve this (how dare him) and then I felt like I had to defend our kids, like "hey buddy, they arent enough for you?" Now I need a swift kick, so anyone out there feel free please to give it to me, because if this would have been a friend, or woman I had known that had gone through infertility, I would have reacted much different!!! So I still am puzzled and kinda left wondering today, why I reacted the way I did? any thoughts?