DEAR ABBY: After 19 years of marriage, my husband left me for a younger woman. I found out later that they had been dating for several years. They moved in together immediately after our separation, and she was pregnant at the divorce hearing. They had a baby boy eight months later.
At every event with my kids, they come together with their son and she steers the conversation to her life, what's going on, etc. I have tried to be silent and civil, but she ruined my daughter's high-school graduation by gossiping and giggling behind me and the kids the entire event.