Okay. So how is this sweet medicine cat going to be related to noble and tense(not really) Firestar?

This is easy:

Firestar's mate is Sandstorm, whose father is Redtail. whose sister is...Spottedleaf! Spottedleaf is Firestar's aunt in law? I'm not very good at these family tree connection. Please correct me if I am wrong! Anyways, I know that they are connected AFTER Into The Wild, but still, this might upset some shippers.

PS>One of my favourite warrior cats is Spottedleaf