Nia Hayes, from Indiana, always knew her dad had fathered another daughter before she was born.
The 35-year-old knew nothing about her older sister, besides the one baby picture that was included in the family photo album. When her father, Lonnie Hayes, passed away at 63 in 2012, she thought the secret had died with him.
All Lana Hayes, 42, knew about her father was that he and her mother had divorced when she was a baby.
She never saw him and only once tried to call him, when she was about 19. She looked up his number in the phone book, but hung up when a child answered the phone.
LISTEN: Establishing your own identity as a twin – how does it work?
Lana and Nia shared a mutual friend, Michael Hurst, who realised the two women looked eerily alike.
He persuaded them to add each other on Facebook. One day after they connected, Nia and Lana realised they were indeed sisters.