A local woman with a rare genetic disease has written a book about her up-close experience with unconditional love.

Nancy Prieston has a condition called melogenisis imperfecta, which caused her teeth to rot as quickly as they grew in as a child.

One dentist News 12 spoke with says it’s a painful condition because it's like having a cavity on every single tooth in your mouth.

Prieston says she was self-conscious as a child and was careful not to smile.

Her mother had the same hereditary disease. Her book “I’ll Never Leave You” is about her parents’ unconditional love.

Prieston got her own real-life happy ending when she married a dentist.