According to his friends, she is at fault. I would ask her friends, but she (A- list singer with A+ list name recognition) has none left. Literally the people she communicated with on a daily basis six months ago are out of her life. If you go back a year, it would have been twice that number and they are all gone too. The ones in her life six months ago, in many cases, had not gone a day without speaking to her in more than a decade. All gone. Those friends had no problems telling me the entire catalog of drugs she takes and has taken, but no one ever saw her use heroin. They say she loves Oxy though so it is not that far to get to the next level.
Lets talk about next level. He (A list singer) has always taken drugs that are higher up the food chain. Coke was just a starter for him. His thing was doing a lot of it and then, he did start freebasing so I am going to go with him being at fault for the heroin. I imagine with her it probably started with snorting. I would say she is still at that level, but she has changed what she wears now when she goes out in public. Covering things she used to bare. At this point, they are rarely venturing out. They both have cut off contact. She is skipping jobs and when she does show up at a studio to record, can't function and just inevitably sits on a couch or chair and nods off. He is destroying his career with cancellations. Promoters hate it. They have already spent money from one show and put it toward another. You start canceling shows and they are refunding money, you are not going to get booked next time. I don't mean to be gloom and doom here, but if they get a full shot of fentanyl, for sure she would die. I don't know his tolerance, but he would probably be gone too.