CHARLOTTE, N.C. -- A Charlotte family is facing the unthinkable, as cancer threatens the bond between their children. One of their four-year-old identical twins is battling Hodgkin's lymphoma.

There are not many ways to tell identical twins apart, but if you look closely, Dilia is more pale, her hair is not as thick and she is 10 pounds lighter.

“This is Dilia, she’s my skinny one,” the twins mother, Melody Mendez Gomez, points out. “This is her sister Deysi. She’s her protector, her little fighter.”

Dilia was three-years-old when doctors diagnosed her with Hodgkin's lymphoma.

“She stopped playing, literally just wanted to lay in the bed,” her mother said.

Painfully shy and utterly inseparable, the girls have a language of their own.

“Sometimes we think they’re talking about us because they’ll look at us and laugh, only they understand it.”

Anyone can see how close the two girls are. Their mother can’t imagine the thought of one without the other.

“Oh no, that is unimaginable, I won't imagine that because I know that’s not going to happen, I know that’s not gonna happen,” she said.

Doctors have said Dilia’s prognosis is good, but the family is still struggling to pay all the medical bills. They have been living in a motel for the past year. The twins' dad is a construction worker and their mom used to clean homes. Since the diagnosis, the mom cares for the girls full time.

“It’s been really hard,” she explained.

After insurance, they’re still paying $1,000 a month for Dilia’s weekly chemo treatments.

“She’s part of our family. We love her," Gomez said. "Last thing we want to do is lose her!”

The father's employer set up a gofundme page for the family. You can help support the family by clicking here.