In order to sustain a cause of action for alienation of affections, the plaintiff must show the following facts:
(1) that she and her husband were happily married and that a genuine love and affection existed between them;
(2) that the love and affection so existing was alienated and destroyed;
(3) that the wrongful and malicious acts of defendant produced and brought about the loss and alienation of such love and affection....
The wrongful and malicious conduct of the defendant need not be the sole cause of the alienation of affections. It suffices, according to the rule in a large majority of the cases, if the wrongful and malicious conduct of the defendant is
the controlling or effective cause of the alienation, even though there were other causes, which might have contributed to the alienation. [Citations omitted; emphasis added.]