One couple from 'The Ultimatum' share the same Zodiac sign, leading to a pairing building on deep friendship and shared humor, an astrology expert said. In season 4 of Netflix’s The Ultimatum: Marry or Move On, six couples agreed to participate in the show’s groundbreaking experiment. Casey and David are ‘true soulmates’Casey came into The Ultimatum confident that David was the man she wanted to marry and be the father of her children. David and Casey’s happy ending makes sense, as the two are “true soulmates,” Tetiana Tsvil, an astrologer and spiritual advisor at Nebula told Showbiz Cheat Sheet. “Their bond leans karmic because it rests on the comfort of history more than on adult alignment,” Tsvil shared.