That was basically the rules that were set for her to continue working on the project with him. BUT, it's important to remember Justin is part owner of this company. So HR is of...limited use, even more than usual.
I think if an actress says no in terms of acting an orgasm or something, the actor and/or director really needs to respect that. Hollywood is littered with stories of actors who take advantage of actresses in sexual scenes. It's not like the movie lived or died on whether or not that happened. It IS common for this kind of thing to happen, but that's the problem - it's common enough that it too often leads to inappropriate behavior.
I will say, there is zero chance Blake's lawyers would have included the accounts of these witnesses if said witnesses were not on board. So if the complaint says someone was there, they're already cooperating with Blake's lawyers in the lawsuit. And we know from the text messages of Justin's PR team that other women had accused him of sexual harassment and that he was known for "whispering sexual innuendos" to women in completely inappropriate situations.