He/She will appreciate your concern for loyalty and your keen awareness that you do not want to compromise her professional status by inadvertently slipping into a dual agent environment.
He/She will respect you for this.
But...I always wonder if the agent really is being an objective 3rd party, and not favoring the seller, since that's who he was working for to begin with. Good luck to you!
A Buyer's agent is someone that will work for you, someone that will help you to understand what you must protect yourself in a real estate transaction. A highly qualify negotiator to get the best terms for the house that you want. A Buyer's agent can pull together all the information regarding to the house that will be the best for you and your family, not the one that he/she listed and need to sell it.
Please get your real estate agent that will work and advocate in your behalf from beginning to the closing table.
Best of Luck,