If she knowingly participated in making the video she doesn’t have to actually hold the camera to be guilty of producing the video. If she didn’t know a video was being made then she’s not guilty of producing child porn.
Either way it’s a supposition lacking any mention of those facts in the article.
Like you I am going on the facts supplied. Based on those there seems to be no assertion she was in on it.
If the facts change, my opinion will change with them.