How to tell people no...

Meg
So, my mother-in-law bugged and bugged us to tell my husbands cousins about the pregnancy. I am 17 weeks along, but haven't made my announcement cards I plan on making for family. Anyway, so I caved and facebook messaged them. (Even though my cousins and several aunts & uncles still don't know.) All was fine until my husbands' cousin is now calling and messaging me because she has decided she has a bunch of stuff she wants to collect up and drop off at our place! Umm.... I'm guessing I don't want many of these items. So, I tried to politely say "Won't you need these items for baby number 2?" (Since their baby just turned one and she had said she wanted another one right away!) She mentioned baby shampoo, conditioner, lotions and such that aren't open- but I'm guessing I won't want the brand since I'm guessing it will be one of the popular types. Also, she said something about a baby swing. I don't really want their baby swing. This is my first baby, and maybe I sound snotty but I want to pick out my own stuff. I just find it frustrating that she just said- oh I'm gonna drop this stuff off! Well, thanks for letting me vent!