For more favorite wedding memories, pick up the latest issue of PEOPLE, on newsstands now. Luke Combs Says He Had the 'Worst' OCD Flare-Up Before Performing in Australia: 'When It Hits ...

After a drama-filled marriage, Luke Cuccurullo and Kate Sisk open up ... The season finale of Married at First Sight airs Tuesday at 9 p.m. ET on Lifetime.