The girls at work shocked me with a baby shower when I was pregnant with my first kid.
That must mean they think you're a pretty cool person! People usually don't go through that kind of effort unless they think you're worth it and deserve it. So, kudos to you for having that kind of effect on others!
Those were a great group of ladies I worked with.
Oh, you don't work with them anymore? Or maybe it was because you decided to be a stay-at-home mother? 
My first child is 12 now so it was quite some time ago.