"This establishes us as a family, a polyamorous family. It is the first time in Colombia that has been done."
Lawyer and gay rights activist German Rincon Perfetti said there are many three-person unions in Colombia but this was the first one to be legally recognised.
"It is a recognition that other types of family exist," he told AFP.
A ruling by the constitutional court in April 2016 made Colombia the fourth South American country to definitively legalise same-sex marriage, after Argentina, Brazil and Uruguay. - telegraph.co.uk