After the wedding, the bride and groom are not allowed to use the bathroom for three whole days. They cannot leave the house, clear their bowels or urinate. The couple is watched over and are allowed minimal amounts of food and drink. If the custom is not practiced, they believe it will bring bad luck to the couple, with consequences such as a broken marriage, infidelity or death of their children. After three days, the couple is allowed to return to normal life and begin their marriage.
Source - Huffintonpost.com