Hostage to fortune by Elizabeth Chaplin.
What was wholly unexpected was Susan Bantham’s more than one-million-pound win in the pools.For her lawyer husband Jeremy, the money is an answer to a prayer, giving him the comforts of a Rolls Royce and a new mistress.Susan’s reaction is more profound…more sinister.She has the chance to have a new image, different friends, an unexpected lover – and the opportunity to avenge herself for twenty years of frustration with Jeremy.All she has to do is concoct a plan to trap her husband in a noose of his own making.Unfortunately for them both, by the time he took a good look at his wife and her anger, someone had to die.But no one could have guessed who, when and why…
A really good read with good characters. Not what I expected but still very good. 4*.

Sorry but I just couldn't get into the plot of this book at all, it feels like something important is missing but I couldn't figure out what that was

What would you do if you won a small fortune? A dilemma for Susan, but not for long as she knows exactly what she'll do. Husband Jeff is thrilled with the win too especially when he buys his pride and joy - a Rolls Royce! You'd think that everything in the garden will be rosy now wouldn't you, but there are other underlying things going on. Interesting concept, but this pair are really quite awful, especially to each other and I for one would rather be penniless than be like them. I would have preferred the story to continue a little more as it ended in a bit of a hurry.

Excellent book. Great main characters and plot. I would recommend this book.