Laura Prepon is sharing the “funny” and “primal” way her daughter welcomed home her new baby brother.

The “Orange Is The New Black” star called into “Live With Kelly And Ryan” on Friday, sharing some TMI details about Ella, 2, and their new arrival, now 4 months.

“She loves this show called ‘Daniel Tiger’ and on his show, he got a new baby sister and we would try and explain it to her and be like, ‘Daniel Tiger has a baby sister, you’re gonna have a baby brother,’ ” said Prepon, 40. “So we really tried to get her to understand the concepts of it.”

RELATED: Laura Prepon On Her Candid New Book ‘You And I, As Mothers’, Becoming A Mom Of Two

View this post on Instagram

These days have been challenging for all of us. Raising a toddler and a newborn in New York during these unprecedented times is tough. To help with self-isolation, I’ve been trying to find ways to feel more connected while sticking with a routine. @peanut has become a big part of that. @Peanut is an app to find support, get advice and share stories about motherhood. It’s really refreshing to be a part of a community of moms who are sharing advice and information. You can start your own thread with a question or concern and then get valuable advice – or check out the existing conversations women are already having. I found one about how NYC moms are keeping their kids active and connected to nature while stuck inside, which I really appreciated. I’ve been feeling overwhelmed lately, but to know I’m not the only one feeling this way has been really comforting. Having community is more important than ever right now, so I encourage you to join and stay connected. I’ve shared a download link my in bio, I’m excited to hear what you think! #peanutapp . #sponsored #ad

A post shared by Laura Prepon (@lauraprepon) on

But when their little one came home, things went south.

“We brought him in to introduce him to our daughter and in her bedroom, we have this pretty cloth tepee — there’s a bunch of blankets in it and stuffed animals, where she plays — and we brought the baby in and introduced them,” Prepon explained. “And it was the craziest thing — she ran into the tepee, took off all of her clothes, stared at us and just peed on everything.”

RELATED: Laura Prepon Reveals Why She Had To Terminate Her Pregnancy In 2018

View this post on Instagram

Wash hands and hold the ones you love.

A post shared by Laura Prepon (@lauraprepon) on

“It was the most primal marking of territory,” she added. “And we were trying not to laugh because we didn’t want her to think it was okay for her to pee on her stuff, but it was so funny.”

Prepon and husband Ben Foster welcomed their second child in February, they have yet to go public with his name.

Click to View Gallery
Most Aww-Worthy Celebrity Photos