Your wife loves you so much that you start suspecting she is slowly poisoning you. That almond taste in your daily meal might not be so healthy. At least inform someone so that they will investigate more carefully and she will pay for it.
Write in a notice that you think that you have been killed by your wife, the police will investigate and hopefully give her what she deserves. Set the notice to be sent to a very good friend, possibly not the one who she is having an affair with!