I have got to disagree with OP.
I have read the article and no, she does not use Ivan's death to promote her business and no she is not a "celebrity wife" but a talented woman on her own right
The only references to Ivan were 1) an oblique reference in the name if her business, "The name Cefinn comes from.a mixture of her children's initials" (names not given and 2) a factual mention of Ivan by the journalist saying that " her eldest died aged six in 2009, he suffered from cerebral palsy and severe epilepsy. "
She is not cashing in on the Cameron name, the venture is mostly self funded(OK her own family are not short of a bob or two ) and she does have family connections with fashion, sister is a deputy editor of Vogue, aunt used to work for Jasper Conran andd her mother founded the interiors company OKA.
So I think we can cut Sam Cam a little slack here, don't you?