Expose your SIL or mind your business?

My husband and I found out that my SIL who he hasn't spoken to in 17 years has a website where she sells holistic oils and stuff and claiming she can cure diseases with it. Serious stuff like diabetes and cancer. We wouldn't care if it was not for her using my husband claiming she cured his cancer and diabetes through her methods. My husband did have cancer when he was 14 but ummm.... Chemo cured him. Another thing is he still very much has diabetes and when he was going through cancer he was living with his dad and step mom and not in ANY contact with his mom and sister. She's literally using photos of him when he had cancer and was clearly a VERY sick child. My husband is disturbed by the whole thing. I think he should call her out and expose her. Especially since she's using his photos that she probably stole from Facebook or something. He is just weirded out by the whole thing. Apparently people are buying her products. Would you expose her?

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