They are finally cut and carried after five years together.
cut and carried
idiom Slang
Cockney rhyming slang · East London
married
Origin
Applying only to the wife who is cut off from the parental support and carried (provided for) by her husband.
My sister and her boyfriend are getting cut and carried in a small ceremony by the sea next month.
Although they lived together for a decade, they decided to get cut and carried only when they realized it would make their legal situation much simpler.