But some family’s challenges might be more challenging than others more extreme, you might say.

“Our ex husbands both said the same thing,” Christina told The List.

“She was told she only had weeks to live in that moment.

Christina and Jessica posing on social media

And she ended up living for three months.

So she’s a fighter … she stayed with us and we took care of her.”

“So there was a lot of healing in it, too.”

Christina and Jessica in a selfie

The sisters said even their mother had trouble understanding.

“It’s just you two, you guys are each other’s everything.'”

In fact, even the twins themselves have trouble with it sometimes.

Christina and Jessica goofing off in selfie

“It’s always been the twins, the twins, us, us, us.

I’m trying to create who I am without her.”

“You know what it is?

It’s having somebody in your life that you are 150% raw, real, and open with.

She knows every single thing about me.

There’s not anything that I can’t tell her.”

New episodes of “Extreme Sisters” air Sundays at 10 p.m. ET/PT on TLC.