My Belly Button is Disappearing

I am 25 weeks and yes my belly button is disappearing! It is very normal, I know but it still does not cease to amaze me! It seems like my belly gets larger everyday! Every morning when I get dressed I swear my clothes are a little snugger and I am bigger than the day before. My belly button is at the stage where it is not poking out but it is SO small there is barely even anything there. This freaks out my husband and he does not understand why it disappears. As the baby grows it pushes out on your stomach causing your belly button to stretch and well disappear. The wonders of Pregnancy.