Only option I can see for you is to buy her out... Get an independent valuation... and pay her half of what that is... If she does not agree to that, you will have decide how much more you are willing to pay. If she wants to have the business at all costs, then you should negotiate with her to get as much as you can for her to buy you out... If all else fail, I don't see a way out except going to court... But even then, you will still be negotaiting. The court will not tell you who should get the business... You have to sit down and talk... No alternative to that...