You would just be a friend
a collaborative relationship is where there is a a good supplier/buyer relationship
If your daughter marries, then the father of her husband is her father in law. That's the definition.
In the United States there are no "legal relationship" between relatives, because no laws define these relationship. These are all customary terms. The child of one's niece or nephew is one's great niece (if a girl) or great nephew (if a boy). The elder relative is a great aunt or great uncle.
i suggest you define your question more.
It means 'define the relationship'
The relationship you describe is called an analogy.
a symbiotic relationship where both organisms benifit
The legal ability to enter into a contractual relationship.
schema
When 1 dude bangs alot of women
Mercantilism
Between that of a Primate and a Scavanger