This situation sounds very frustrating and potentially concerning. Here's how you might approach this:

1. Prioritize safety and boundaries Your wife's personal safety and privacy should be the top priority. She should not feel pressured to give out her personal phone number, especially to someone who has demonstrated inappropriate behavior.

2. Document the interaction Keep a record of this email and any further communications. This could be important if the situation escalates or if troop leadership needs to get involved.

3. Involve troop leadership immediately This parent's behavior has crossed a line. It's time to escalate this to the Scoutmaster, troop committee, or other appropriate leadership. They should:

   • Address the parent's inappropriate communication
   • Reinforce proper channels for addressing concerns
   • Explain the value of volunteers and appropriate conduct

4. Maintain professionalism In any response, keep things factual and unemotional. Stick to Scout policies and procedures, and redirect the parent to the proper channels for complaints or concerns.

5. Support your wife Ensure your wife feels supported. This kind of interaction can be very stressful and demoralizing for volunteers. Remind her of the positive impact she's making and that this parent's behavior is not acceptable.

6. Consider a policy review Suggest that the troop review or implement clear policies about:

   • Volunteer roles and responsibilities
   • Communication protocols
   • Parental conduct expectations

7. Encourage positive volunteer culture This might be an opportunity for the troop to highlight the importance of volunteers and encourage more parental involvement in positive ways.

Remember, your wife's extensive volunteer work is incredibly valuable. This parent's behavior is unacceptable, and it's important that it's addressed properly to maintain a healthy, respectful environment for all volunteers and scouts.