I'd imagine "murderess" trumps "wife" when defining a close relationship.

And we’re at four. Alexis Ann, I think we’re in an abusive relationship.

Many people engage in physical relationships without ever experiencing intimacy

What is it with you and that book?"Rafael laughed. "We have a personal relationship.

The teacher-student relationship evaporated, replaced by a rich and lively exchange of equals.

Relationships we complain about nevertheless keep us connected to life.

Children are our second chance to have a great parent-child relationship.

I believe the meaning of life is the relationships we have with each other." 

The relationship between critic and writer is similar to the one between the pigeon and the statue.

I hope that anyone I worked with wouldn't exploit our relationship.