Hi KJ,
I firmly believe in a shower for every child. A shower is more about celebrating the new life coming than it is about gifts. It doesn't seem right that the first child is the only one that has pictures of their loved ones gathered together to celebrate them before they are born. Have a get together for her. It doesn't have to be anything elaborate. Like another Mom suggested you can call it a neccesities shower because everyone needs diapers, bottles, binkies, clothes or stuff for Mom like lotions, books, clothes. One activity that I love at showers is to have everyone write a letter to the baby. Get some cute scrapbook paper and have each guest write something short to the baby. Then you can bind all of the letters together and it is a great keepsake for Mom and then for the child later.
Take care,
B.