The last I heard was that the B. was suing the advertising agency for promoting this campaign. Finger pointing at everybody by everybody.
They can't shuffle the blame off to the agency, they are probably more responsible for the content of the ad than the agency. The client approved the idea, saw the photos and the final ad proofs. Most fashion clients are very involved in the styling of the shot, usually present in the studio. I guess today, that can be done virtually.
Fashion advertisers have long sought controversy in their ads. Witness all the work by Helmut Newton. In today's more permissive atmosphere, advertisers feel they need to push the boundaries even further.
The bottom line in this instance is poor taste and poor judgement on everyone's part. And the combustible environment of social media, where anything can be interpreted as instant scandal. Still, this is nothing like Terry Richardson's sexual assault of underage models.
https://www.marieclaire.com.au/terry-richardson-every-sexual-harassment-and-assault-allegation