This is the next step and the slippery slope is real. Polyamory and polygamy are indeed next on the list of changes that will assault marriage.
The Youngs are women in a committed relationship who love and care for and look after each other. They share domestic duties and financial responsibilities. They share a bed and make love. They have a child (courtesy of sperm donation and in vitro fertilization) and intend to have two more. They were united in a ceremony in which they wore beautiful white wedding gowns and were walked down the aisle by their fathers. They are just like any ordinary Massachusetts opposite- or same-sex married couple. Only they’re not a couple. Doll, Kitten, and Brinn Young are a throuple. And, for now at least, Massachusetts, like other states, does not recognize as marriages “polyamorous” unions (romantic partnerships of three or more persons).