I am from an area where no one does second showers unless kids are more than say 3 to 5 yrs. apart or a mom happens to move to a new area and is pregnant. When I moved to So Cal, had DD1, then made mommy friends I got invited to six showers for second children, and only two of those were for twins. All of those moms knew the sex of the baby except one. All but one the kids were less than 3 yrs. apart. No one offered to throw me a shower for DD2 (but we didn't know the sex) and I was upset about it because I thought it was the norm, however I never once said anything. Even a brunch would've been nice, but no one thought to do that too. Moral of the story is go with it, and have fun. These types of things don't happen all of the time and it's just a good sign that you have some wonderful friends!