Sister in law wants free baby gears.

My husband and I just have our first baby 8 months ago. We never had any baby showers when we were pregnant and we spent thousands of money on every baby gears out of our own pocket. His 31 years old sister still haven't had any kids yet, because she is waiting for our baby to grow older so she could get our baby stuff for free. I'm so pissed because she never even offer buying our baby anything. My husband told her we would sell our used baby stuff to her at a discount and she refused. Yesterday we all went out for lunch and she saw our "baby on board" sign behind our car. She was like, "oh we will take that sign too in the future". I rolled my eyes. We told her we might want a second child in a couple years, and she said she can wait. I just don't feel good because she spend so much on shopping herself, and my husband and I had to save so much for our baby stuff. Like, if she offers to buy some of the baby stuff when I was pregnant then I wouldn't be feeling like this. I just needed to rant.