On October 25, 2003, she married Paul Levesque (better known by his ring name, Triple H) at the St. Teresa of Avila Catholic Church in Sleepy Hollow, New York and now goes by the name Stephanie McMahon-Levesque. Stephanie and Triple H have one dog, an English Mastiff named Bluto. Stephanie took motorcycle riding courses along with Triple H a few years ago when he was preparing for his role in Jornada del Muerte. They own a 2006 Harley Davidson Fat Boy and in the past owned a 2004 Custom Iron Horse, bought from Ric Flair. She has two sisters-in-law, her brother Shane's wife Marissa Mazzola and Triple H's sister Lynn. She is the daughter-in-law of Paul and Patricia Levesque. Stephanie has two nephews, Declan James McMahon and Kennedy Jesse McMahon, who are the sons of Shane and Marissa. Also, she has a nephew and niece by marriage, Lynn's children Peter and Nayssa.

On January 8, 2006, WWE announced that Stephanie and her husband, Triple H, are expecting their first child, due on July 27, 2006. The public announcement broke kayfabe in that it contradicted WWE storylines, which saw Stephanie and Triple H divorce in 2002. Stephanie continued to work and travel with WWE throughout her pregnancy, giving birth to an 8 lb, 7 oz (3.8 kg) baby girl, Aurora Rose Levesque, on July 24, 2006. The birth was announced live on RAW by Todd Grisham. In 2008, Stephanie is expecting her second child, due this July.