bondmate 

the joining of two souls that are bound to be together

they are forever bondmates

bondmate by adrienne campbell October 24, 2008

bandmates 

A term used by two members of a band to cover up their homosexual reletionship.

"We're not lovers, we're bandmates!" said the boy to his disaproving parents.

bandmates by Lily Pad December 24, 2006

Bandmate In-Law 

Bandmate to the In-laws.

My father-in-laws bandmate is my bandmate in-law.

Bandmate In-Law by Courtz Crystal November 9, 2019