Any nanny out there would refuse to keep 3 young kids?

We are a « young » couple looking to potentially start trying for a third. Our first is almost 4, our second is 3 months old and we’re actually excited for a third. Yes; we know it’s chaos, we know 3 is a tough number. We just feel like our family would be complete with a last little one…

But we have a currently amazing nanny; and we realize when we talk with people that 1 or 2 kids usually seem like the perfect number - easy to find people that would be okay to take 1 or 2 kids… 3 is another level. We know it by experience in our family. We’re scared our nanny might not be okay with keeping a third child.

Is that something common ?

We really would be sad to lose her…