Do you agree?

I had a miscarriage at 6 and a half months. I was pregnant with twin boys. Jacob David and Daniel James. To me I will always consider them my first kids. I heard their heart beats. I saw their faces. I have the sonogram from when they were holding hands. They were developed babies. I had to push them out the same way as if they were born alive. But my sister and I had an argument and she told me to get over it because it's not like they were alive. But they were! Does anyone else agree with my standpoint of them always being my first kids?