I have a cousin in FL that I don't speak to, but my grandma asked me to call her

and see if she needs to come up here. She lives in Delray Beach....

Of course I will....not her fault my dad and her mom don't speak....

You should DEF call her! I am in a similar situation with some of my cousins. Blood is thicker than water (a whole lot of water in Francis's case lol). Sorry, bad joke...
In all reality, life is too short to fight other people's battles. I am constantly hearing in my family how this one isn't speaking to this one for some reason that neither of them can remember any more. I still think that if faced with an emergency like this, everyone of them would open their homes to each other. Regardless of the situation that made them mad in the first place, at least the other person would still be around to fight with!