not at all. The title is still in her name so if she refuses to release her interest in the property, she could kill the sale.Would the accepted short sale prevent her from walking away?
The problem here is: do you "purchase" the lease along with the house or not. Generally, a contract can be transferred but it is not automatically so. It must be agreed upon by both parties. That means you do not have to accept the lease and as such the leased equipment if you do not choose to do so (at least based on the info you have given)
Whether you move forward or not is really up to the seller at this point. Considering the situation, I would look to what damages you can seek from her should she kill the deal and let her know you intend on seeking damages from her should she kill the deal.

