My daughter's future in laws spoke French the whole dinner thinking I wouldn't understand

My daughter's future in-laws flew in from Europe to meet us, and they spoke French the entire dinner thinking I wouldn't understand a single word. What none of them knew is that I taught high school French for thirty-one years in the same town they were laughing at. I sat there with my hands in my lap and listened to that woman explain, in front of my daughter's face, exactly what her son's wedding was really for and how long my girl was expected to last. Then I heard what she said about my daughter, and I set down my fork, and I answered her in her own language.