What's the Name of That Book??? discussion

This topic is about
A Kiss Before Dying
SOLVED: Adult Fiction
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SOLVED. Mystery/Thriller told from perspective of charming unnamed killer who has plans and ambitions. Dorothy, daughter of copper mogul, gets pregnant. Spoilers ahead. [s]
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A Kiss Before Dying by Ira Levin? There are different cover images including - https://en.wikipedia.org/wiki/A_Kiss_...
Google search of Goodreads:
site:goodreads.com "mystery" "thriller" 1950s "unnamed" killer marries rich women pregnant
Google search of Goodreads:
site:goodreads.com "mystery" "thriller" 1950s "unnamed" killer marries rich women pregnant
I think there were three main woman characters throughout the book, possibly sisters. i don't remember distinctly what happened to the second woman but I believe it was like the first woman. The fact that the reader does have a description of the man is used to suspensefully reveal that the second woman is also dating him, before she meets a grim end. Anyway the third girl enters the book, and is very suspicious. The similar pattern plays out but the man ends up being thwarted by the third woman (possibly other players here but I don't remember them). The book ends with a tour of her family's copper processing plant (??) where the mysterious man is gleefully excited by the wealth he is going to inherit and I think it ends with the family pushing him into the molten copper as revenge.
A very rough plot but I must of read it sometime between 2012-2014, but could certainly have been published before that. I remember the cover was this kind of 50s pop art of half a woman's face. If anyone has any idea