I don't understand your accent on Linda and what she is doing. You can only live your own life. No one else (therapist) can get you out of the mess. We can tell you what we'd do if we were each of you but it's not something someone other than any of the three of you can do.

Were I Joey, I'd leave Linda.

Were I Linda, I'd leave both of you; I don't think she can be happy now with either person with the knowledge and weight of the other person on her mind and heart.

Were I you, I'd leave Linda and start therapy. I'd write a personal note and apologize to Joey.