Not really. He knew she was married, and not only did he try and pursue a relationship with her, he actively tried to break up her marriage.
Like I said; in cases where she'd approached him, or brought up her unhappiness and desire for a way out, alienation of affection wouldn't work as a tort. It HAS to demonstrate that she was in a loving marriage and that it's the action of the accused that destroyed that marriage. The cheating is a part of that, but it isn't a necessary part; it's evidence towards the accusation, but isn't itself what the tort is about.
FWIW, traditionally, the charge was largely used by women to sue other women (or men, for that matter) who'd lured away their husbands.I don't use this word often at all. But I will dub this, the cuck law.