No, you most likely cannot. The civil legal system (e.g. lawsuits, since you'd have to sue her for anything she does not voluntarily choose to return to you) provides compensation for losses you suffered. If you sold the house, you suffered no harm, since you by definition accepted the offer and agreed to it, since you could have refused the offer and refuted your realtor's statement if you chose--the realtor cannot bind you against your will. You could have refused to sell, no matter what the realtor said. In choosing to sell, you showed that you agreed to the offered price. Not having suffered any harm, since you sold your house for an offer that you did ultimately decide to accept, you are not entitled to compensation for any loss, since you suffered no loss.