"We had a nice conversation", Behn, 45, said.
"After five minutes, he says "Hey, let's go out and have a cigarette" - and then he touched me right on the balls under the table". Stunned, Behn said he replied, "Eh, maybe later?"
The former royal previous year divorced his wife, who is the only daughter of King Harald V and fourth in line to the throne.
Ari divorced Princess Märtha Louise of Norway past year after marrying in 2002.
In the wake of the scandal, Netflix has chose to remove Spacey from the upcoming season of "House of Cards".
DC Movie Producer Jon Berg Exits Warner Bros., Joins Roy Lee Banner
This has prompted the studio to rethink the DC Extended Universe and their first course of action is replacing Jon Berg . Berg will instead be working alongside producer Roy Lee of films like The Lego Movie and It.
Spacey, 58, has been accused of sexual assault by more than a dozen men, including "Star Trek: Discovery" star Anthony Rapp, but has denied all allegations.
United States actor Anthony Rapp alleged Spacey made sexual advances toward him in 1986, when Spacey was aged 26 and Rapp just 14.
After the allegations were made, Spacey released a statement where he insisted he did "not remember the encounter" but said he "owes him the sincerest apology".
CNN also reported that eight current or former House of Cards workers claim that Spacey made the production a "toxic" workplace.
The woman told HuffPost about the encounter, saying when she was told Yeatman worked for Netflix, she marched over and asked him directly (without telling him who she was) why Netflix hadn't acted on this. This does not include 20 anonymous complaints made against him for alleged misconduct at the Old Vic Theatre in London where Spacey was artistic director 2004-2015.
Spacey has not been arrested or charged with any crime.