Between 1980 and 2018, the chance of having twins increased by 72%, but twins are still uncommon, occurring in about 33 out of every 1,000 births. Identical twins are even rarer, about 3 or 4 per 1,000 births. Savannah Combs, 23, from Middleburg, Florida, was overjoyed to find out she was expecting twins. Shortly after,…

Before Beverly began acting strangely, Martha thought her mother-in-law Cheryl’s insistence on babysitting every Wednesday was just a harmless favor. But soon, Beverly started refusing the meals Martha prepared and mentioned a mysterious “friend” her grandmother kept talking about. Feeling uneasy, Martha decided to set up a hidden camera to find out what was really…