Sarah Rafferty as Katherine and Nikki Rodriguez as Jackie in Netflix’s ‘My Life with the Walter Boys’.Photo:Chris Large/Netflix

My Life with the Walter Boys. (L to R) Sarah Rafferty as Katherine and Nikki Rodriguez as Jackie in episode 102

Chris Large/Netflix

There’s a love triangle at the center ofMy Life with the Walter Boys, but the new hitNetflixseries is really a story about family.

“Katherine’s so different, so that is something that really appealed to me. I also am a proud mom in my real life. My life revolves entirely around my children at this point in my life, and Katherine’s does too,” Rafferty, 51, tells PEOPLE of her decision to join the series.

The opportunity to work with a slew of young and fresh actors was another draw. “I was so excited to work with younger actors at the beginning of their career. I can’t even tell you how lovely that is.”

“For me, that was an energy that I treasured, and they filled me up in a way that I didn’t know I needed,” she says. “I guess that sounds sappy, but it’s really kind of true. They were so easy to fall in love with.”

Sarah Rafferty as Katherine and Marc Blucas as George in Netflix’s ‘My Life with the Walter Boys’.Chris Large/Netflix

My Life with the Walter Boys. (L to R) Sarah Rafferty as Katherine and Marc Blucas as George in episode 105

Scenes with the 11 kids and her on-screen husband, George (Marc Blucas) were her favorites. “I loved the group scenes, the chaos of the group scenes, and the challenge of finding the points of focus in that — which is a very real challenge as a busy mom anyway.”

Some of the “group scenes” were among the first she shot when she joined the cast on set a month late — she was delayed due to filming conflicts onChicago Med— and she says she loved joining in on the action.

“That was kind of amazing, to have to jump into this familiarity,” Rafferty shares. It was “challenging,” though, too, but she once again applauds her costars for bearing their share of the weight.

“Whenever I got a one-on-one scene with each one of these actors, it’s just like they made my heart beat because they’re so grounded and so open and so spontaneous and generous. It really was just so wonderful.”

TheSuitsalum recalls one scene in particular where she held Rodriguez’s hand “and I was like, ‘Oh, we both feel safe here.’ It was just so easy. We just suddenly had this familial vibe.”

She calls the show’s 21-year-old lead “the greatest” as she raves that their instant chemistry “just speaks to, again, who she is and how available she is as an actress, how available her heart is.”

“She made it like I didn’t have to do any work. I just had to look in her eyes and just be present.”

The impressive performance of her on-screen kids helped her manage the overall chaos — but the atmosphere wasn’t exactly unfamiliar.

“I come from a big family,” she says, though she admits she wouldn’t be able to handle the 11 kids, majority of whom are teenagers, that her character does. “I love the chaos. I do love it. And for my kids, they’re very close to their cousins who are all older than them. And I really, really, really value that.”

Sarah Rafferty attends the Lanvin Womenswear Spring/Summer 2023 show at Paris Fashion Week.Pascal Le Segretain/Getty

Sarah Rafferty attends the Lanvin Womenswear Spring/Summer 2023 show as part of Paris Fashion Week on October 03, 2022 in Paris, France.

Pascal Le Segretain/Getty

Her own two kids also bonded with her on-screen ones.

“I would call my kids, and then there would usually be — three of my fake sons would be in the car — and they’d all talk. And they were so sweet,” Rafferty says of how the band of Walter boys made an effort with her kids, who she shares with husband Santtu Seppälä.

“I’m so grateful for my two. My two are perfect,” she says. “I know that I couldn’t handle any more.”

Never miss a story — sign up forPEOPLE’s free daily newsletterto stay up-to-date on the best of what PEOPLE has to offer, from juicy celebrity news to compelling human interest stories.

My Life with the Walter Boysis now streaming on Netflix.

source: people.com