Our 30-year-old son met a 25-year-old Russian woman via Instagram. Their only in-person interactions have been vacations in Serbia, Mexico, Istanbul, and London, for which he has paid. We met her in person at Christmas in London with our other two sons, daughter-in-law, and grandchild. She showed no interest in spending time with us. How best do we discuss our concerns with our son?
— From Russia With Issues