Jason Isaacs Used a Prosthetic in His Now-Viral White Lotus Nude Scene, Sam Nivola and Sarah Catherine Hook Reveal

As it turns out, we don’t know Jason Isaacs as well as we thought.

Days after Isaacs’ White Lotus character flashed his family in a now-viral full-frontal moment during the March 9 episode, his costars dished on what it was like to film the scene.

In a recent interview with TV Insider, Isaacs’ onscreen children, Sam Nivola and Sarah Catherine Hook, revealed what fans really saw beneath his robe. “That wasn’t his real penis!” Nivola, 21, divulged.

“It was a prosthetic,” Hook, 29, added, before noting, “It was really funny. He was very excited to do it. I think he took pride in the prosthetic. He gave that guy a nice shot.”

“He’s like, ‘It’s my fake d— scene today!’” Nivola recalled.

In a March 9 interview with Decider, Isaacs addressed how creator Mike White came up with the “great moment,” although he admitted that nudity is “not something I’m keen on doing in my social life or in my professional life.”

“I don’t remember filming those scenes — I think it’s digital. I wasn’t there that day,” he joked.

“Look, [White] is trying to right the balance of how many naked women I’ve seen growing up on every television show and film,” Isaacs went on to explain. “Nudity is the thing. He uses it sometimes for comedy, sometimes for sex, sometimes [for] the manipulation. It’s a good TV moment.”

The actor is right — White does not shy away from nudity when it comes to The White Lotus. In fact, the season kicked off with a glimpse at Patrick Schwarzenegger’s nether regions in episode 1.

At the Feb. 10 premiere, PEOPLE asked his mom, Maria Shriver, how she reacted to the explicit scene. She said she simply turned a blind eye.

“My kids were like, ‘Did you see that?’ And I was like, ‘No. What?’ ” she told PEOPLE exclusively, indicating that she was only focused on her son’s face and never looked any lower.

“So that shows you — a mother’s eyes are always on the kids’ eyes,” she quipped.

His father, Arnold Schwarzenegger, had a slightly different response.

“What a show! I could claim to be surprised to find out he has a nude scene, but what can I say – the apple doesn’t fall far from the tree,” the former California governor captioned an Instagram post of him and Patrick.