MaryAnne Lopes of Windham, Maine, had no intentions of pulling threads from the nation’s social fabric by living with her then boyfriend, Joe. She just wanted to save some money. The couple, who celebrated their sixth wedding anniversary on Sunday, moved in together because it was cheaper and because she was living with her parents following a divorce from her first husband. “You try telling my father, the Reverend Dr. Young, I will not be home tonight!” she said, laughing about dates with Joe. But while Lopes, now 40, considered her protestant minister father’s possible discomfort with overnighters, he raised...