Agreed. There's a good reason to not answer questions, but requests for ID should generally be complied with unless you have the time to go to the police station.In this situation, it seems quite clear to me that the officers involved were called to the scene, the car and occupants were identified, and the officers proceeded to investigate the situation that raised the complaint. If laws are similar in California as they are here, officers can't charge someone with indecent exposure and/or lewd conduct unless the officer his/herself witnesses the behaviour. As such, if she had simply identified herself and her husband/partner she would likely have been cautioned about lewd behaviour in public and sent on their way. By escalating the matter, she put herself in the unfortunate position.
I'm not sure how "struggling" is defined, but this actress has had a lot of work since Django. Check her Imdb filmographyThe upshot is a bunch of negative publicity - but I guess for a struggling actress, any mention in the media is a good thing - but for her husband/partner, it's probably not too helpful depending on his career.
I notice the Supreme Court made a point of noting in Hilbel that the Nevada statute it was upholding as constitutional did not require the detainee in a Terry stop to show police a driver's license or other identifying document, but only to tell them his name.
The Court also said that requirement did not violate the Fifth Amendment because compelling Hilbel to give police his name, by itself, did not expose him to any substantial risk of self-incrimination. The Court recognized, though, that there might be circumstances in which that issue would come up:
"Still, a case may arise where there is a substantial allegation that furnishing identity at the time of a stop would have given the police a link in the chain of evidence needed to convict the individual of a separate offense. In that case, the court can then consider whether the privilege applies, and, if the Fifth Amendment has been violated, what remedy must follow."
I don't see how the police did anything unreasonable in this case, or what good reason this woman had not to cooperate with them.