Good luck to you - tricky situation.
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Well, it appears you are in a tough spot with one of two choices. Either you have a meeting with her voicing your concerns and setting some new ground rules reminding her that you and your husband are purchasing the property, that you want to see foreclosures and that all showings be private or you can ask her (or her broker) to release you from the Buyer Broker Agreement you signed.
Best of luck,