Barbara Paul 
In-Laws and Outlaws [EPUB ebook] 

A widow returns to Boston to aid a family plagued by death Gillian stopped being a Decker when her husband, Stuart, died, and she considers herself lucky to have escaped. The Deckers are ruthless, a family of power-hungry backstabbers who live for profit and sneer at love. Stuart was different, but even he obeyed his older brother Raymond like he was a god. Since she lost her husband, Gillian has tried to forget his family, until a notice in the paper brings it all rushing back. Raymond is dead, and the Decker empire is being washed away by blood. When Raymond’s widow begs Gillian to come to Boston and help her prove that her husband was murdered, Gillian can’t deny her. Raymond was the fourth Decker to die in the last few months, just a few years after his son was kidnapped and killed. Someone is trying to wipe out the Deckers, and if Gillian doesn’t tread lightly, she may join her husband in death.