I interviewed quite a few daycares after I had my second and every time I asked whether there was a sibling discount.
my family and friends assured me there would be such a thing once I had two kids
Well....it was like trying to find the abominable snowman - no such thing existed. In all my interviews not a single daycare offered me a discount when I asked.
I also do not offer a sibling discount now that I am on the other side of the fence