I'm not an attorney and I'm not giving legal advice... there got that clear.
Why do you want to get out and how much is it worth to you? Debt Free Dave mentioned Dual agency, but he is mistaken. Colorado doesn't do dual agency anymore, it's called transaction broker now. If your agent didn't inform you that she had a relationship with the buyer at the start or in other words if she didn't disclose to you that she was switching to being a transaction broker, then she is in violation of the real estate commission rules. As such, she could be fined, suspended, or lose her license. As such, the threat of filing a complaint with the state real estate commission might be enough to convince her that she needs to deal with this situation in a way that you will be satisfied with. Bad Realtors give the whole group of us a bad name. If she is not following the rules then she deserves to get out of the business. I would need more info to make a better assessment of the situation.
Richard Davis, Broker