Aunt-in-law (only pibling's wife).
My aunt-by-marriage is a good person.
My great-grandpibling-by-marriage is a good person.
When your significant other manages your life down to the smallest detail.
Honey, stop micro-marriaging my life! If I want to eat a BigMac covered in Hershey syrup I can!
Showbiz marriage is when two celebrities who are in the same band or cast show a deeper relationship with each other over a longer period of time, like a marriage regardless of both people's actual relationship status. The couple in question is often also referred to as an OTP.
Fan 1: Paul McCartney x John Lennon is my favourite famous couple.
Fan 2: I know, it's like a showbiz marriage!
Nephew-in-law (only spouse's nephew).
My nephew-by-marriage is a good person.