Sorry to hear that you are feeling stressed over this situation.
Keep your Dignity, Poise and Grace! Remember that only YOU have the right to control how you feel. Do not allow them to upset you.
I used this line with the COBE who was trying to harass us:
"Thanks for your interest ___, but I am sure that you will respect our privacy and appropriate boundaries. If this sort of behaviour took place in a work setting, it would be classed as "harassment", and I would be forced to avail myself of the legal means at my disposal. Have a great day, and all the best to your family"