I'm being stalked

Six months ago while working late one night I overheard a telephone argument between my boss and his wife where my name was mentioned twice before he screamed, "I'm WORKING!" Since then, the wife (who also works with us) won't talk to me or acknowledge me in any way. Additionally, they began having fights in the office and are obviously going through something personally. They are both going to individual therapy sessions and they are seeing a marriage counselor. Needless to say, this has put a strain on both my job and my relationship with my boss. I've tried to carefully address her behavior with my boss, but he shuts me down. I've spent the past 6 months trying to figure out what I may have done to deserve this treatment, but I've been unsuccessful. It would take me too long to explain why I began to suspect that she was stalking me, but I was right - she WAS stalking me. She even went as far as to perform an online background check on me to obtain my home address, and then resorted to driving by my house. A crafty IT friend, with the help of IP addresses tracking, determined that she was stalking me all over social media. Not just looking at my social media accounts a few times: it was many times a day - every day. Three weeks ago, I caught her logged into my personal Facebook and she had apparently been logged into my account for 6 days. This totally crossed the line for me. My Facebook is like a diary of my life for the past 9 years. I feel invaded. My big question was: how did she get my password to my Facebook account? My crafty IT friend began helping me again. Ultimately we determined that a keylogger and monitoring software were installed on my work computer on October 22. A review of the security cameras showed that my boss is the only person who entered our office that weekend. While it's not typical for me to do anything personal at work, I have logged into Facebook. That's how my password to Facebook was obtained. So is he helping her stalk me? That's what I thought at first. Until last week when my crafty IT friend helped again. We were able to determine that my boss is the one that has been stalking me - not his wife - and he is the one who had been logging into my Facebook. Apparently she was stalking me through most of the summer, and then he started stalking me. I am beyond weirded out.

Thank you for responding. I don't believe he is talking about me too much. I suspect it isn't that simple. They are new empty nesters. She began working in our office for something to do. I believe that after 20 years of raising her children, she realized that she didn't know anything about her husband's life outside of the home and it bothered her. She found that he has full and busy days, with comraderie in the office. I have heard rumors of his cheating, so maybe he has given her reason to behave such a way. I also know that they have had periods of separation the past few years, so I think their marriage hasn't been great for a long time and this has compounded their problems. Once I became her focus, I also became his and he took it too far. He is controlling and has been stalking his children for years via social media and gps units in their vehicles. This must be his thing. I am leery of both of them now and feel vulnerable.

PS He owns the company so there isn't anyone I can go to about this. Also, I am the HR Manager...