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I'm very sorry to hear about your situation. Such a cause of action would be called "alienation of affection", in which you would sue the paramour of your spouse for breaking up your marriage. That's essentially the only case that you can have against someone who does this, and unfortunately Washington state no longer recognizes "alienation of affection" claims (it was abolished in Washington state in 1980). The only States in which alienation of affection is possibly a viable cause of action:
- Missouri (appears recently abolished)
- New Hampshire
- New Mexico
- North Carolina
- South Dakota
To be able to sue the company, you'd have to have a case against the company itself, or against an employee / director of that company that was acting in the scope of his/her employment at the time. As there'd be no underlying case against the employee / director, there'd be no case against the company. To illustrate this idea, if someone driving for his/her company runs into your car negligently, you'd be able to sue that driver, but also the company, because the employee was in the course and scope of his/her employment at the time that he/she ran into you. But if you don't have a case against the employee, you wouldn't have a case against the employer.
Now that being said, you could still seek a disproportionate amount of assets from his due to his intentional actions. But you wouldn't have a case against the company or her, no matter how egregious or awful those actions were, because Washington has done away with such a cause of action.
I know this is probably not what you wanted to hear, but it is the law. I hope that clears things up anyway. If you have any other questions, please let me know. If not, and you have not yet, please rate my answer AND press the "submit" button, if applicable. Please note that I don't get any credit for the time and effort that I spent on this answer unless and until you rate it positively (3 or more stars). Look for the stars on your screen (★★★★★). Thank you, ***** ***** luck to you!