WARNING: The following post is extremely graphic and contains nudity. Please read at your own risk.

While you were watching Allison Williams — daughter of NBC News’ Brian Williams/former Peter Pan — look like one of the paintings from ‘Big Eyes’ at the Golden Globes last night, she was acting in an extremely X-rated sex scene on Girls — with her character Marnie taking part in an act that she described as “ass motorboating”.

She somehow managed to turn her fictional rim job into a rite of passage (pardon the pun) — which she embraced not only as a Pinterest project (she wanted to smell like cake), but also a family affair.

Courtesy of HBO

“Because of my wiring, I read it in the script and I went into total action mode. I got everyone together and I was like, ‘All right, Grace [in wardrobe], you and me — we’re going to come up with something so ingenious that he is going to feel comfortable,’” the 26-year-old actress explained.

“I mean, think about where he is… I grabbed the makeup girl and said, ‘I want to smell like a cake,’ so we put vanilla cream everywhere so everything smells good. And then I’m like, ‘Grace, we’re going to rig something invisible from the side but that feels like a pillow when he puts his face into it.’”

READ MORE: ‘Peter Pan Live!’ Was the Hot Mess You Expected It to Be

She ended up creating something like that — thanks to altered Spanx, menstrual pads, two thongs and, most importantly, help from her mother!

“I got some advice from my parents, because they too are veterans of the show, so their thinking has changed as well,” Allison explained.

“I’d get a call from my mom and she’d be like, ‘Maybe if you took a thong and cut it away from the sides but you stuck it on in the front and the back it could work.’ I was like, ‘Mom, I like your thinking.’ Just your regular dinner conversation!”

allison williams

Allison and her parents, who we’re sure are very, very proud. Photo courtesy of Getty.

And — because we know you’re curious — her famous dad was cool with it, too.

“She’s always been an actress,” the NBC anchor told Vulture.

“For us, watching her is the family occupation and everybody has to remember it’s acting, no animals were harmed during the filming, and ideally nobody gets hurt.”