unknown book the title started with V, either Valhalla or Void, genre is Thriller, fiction, romance

[Saaraa]

The plot is about a scientist type person creates a love potion and doesn't wanna use it for bad stuff, has a daughter, another evil man has a wife and some sons, when wife tries to run away with one son, he kills wife and brainwashes the son to be obedient to him at a young age, the evil man thinks loyalty is above everything, manipulates the scientist to give him the love potion, makes some excuse, makes the son seduce the scientists daughter and coerce the love potion to be given to the evil man so that he can give love potion to a model and make her fall in love with him, son falls in love with the scientists daughter, love potion doesn't work when two people are truly in love, the other son of the evil man has his own agenda and cooks up another plan, evil man kills scientist
I read the book back in 2019 and an important detail about it is when I read it, it had the 2nd changed name. Earlier the name of the book was different