It's too late for this idea in this situation, but it might be of interest to others thinking about getting into a partnership. Because most partnerships eventually go south, there is something known as the "Shotgun Clause". (I don't know who named it this, but this is what I've always known it as.) If your partner wants you out and comes to you with a lowball offer, you can invoke the Shotgun Clause, which gives you the right to buy him/her out at exactly the same terms, and THEY HAVE to accept. It's the risk they take by making an offer. It's designed to get them to make a "fair" offer, or one that they would accept.