For those of you who are questioning the relationships between 2
brothers to 2 sister marriages, I have a dozie of a relationship that
you can consider.
I know this family personally.
There are 2 sisters who married. One sister married the father, the
other sister married the son.
Relationship became: Older sister became mother-in-law to younger
sister and step-mother to her brother-in-law. The father became the
brother-in-law of his son.
Younger sister's husband became her step-brother.
Only the younger sister & her husband had children. The children could
call the older sister either Aunt or Grandmother and can call their
grandfather uncle (they called them their grandparents).
It would have been more complicated if the older sister & the father had
Montreal, Quebec, Canada