Actually, in a worker's comp situation, this isn't too terribly uncommon. The thing is, no matter how grave the injury, the amount that the actual victim can be paid by worker's comp is fixed. So much for so much damage. They can't get any more, no matter what the circumstances or the situation.
So attorneys try to say that the person's spouse suffered a tremendous amount of hardship and trauma because the person was injured, and they try to sue the employer for that supposed trauma to the spouse. "Loss of consortium" is just one of the aspects.
But yes, believe it or not, it's been done, it's not illegal, and in some circumstances, they might actually prevail. It sounds very much as though this OP has talked to an attorney and is now just sounding us out.
In a Worker's Comp claim situation you have to remember that if you have an attorney, if you are approved smoothly you very likely won't get more, you'll just have to pay the attorney part of what you would have gotten anyway. So they're definitely looking hard for another angle to come at it from. Having the spouse sue the company is one of those.