Borax should not be where a pet or child can get to it or walk in it. It could kill them. Brewer yeast is good to give your pet for fleas. One of my cats loved the taste of it and the other did not.
Alcohol has a drying effect whether you apply it or drink it.
It's your first cousin once removed or just say your mother's cousin to simplify it. And we address them as Uncle or Aunt out of respect in our family. Mr and Mrs were for mom's friends (not relatives).