DEAR ABBY: My husband, daughter and I all have birthdays in the same month. My mother-in-law always sends gifts for me and my daughter, but never to my husband, her son. He tries to shrug it off, but I know it bothers him. In earlier years, I thought it was an oversight. I have tried gentle reminders and hints, but again this year there was no gift for her son. It would be different if she sent one only to our daughter, but sending one to me and not to her son is a slap in the face. They have a ...