DEAR ABBY: My husband and I have a happy, adorable 18-month-old son. Understandably, he’s the light of our lives. Early in my pregnancy, I decided to not post a pregnancy announcement or pictures of him on social media. I felt my son should have the autonomy to build his own social media presence as he saw fit. During the past year, I have felt comfortable sharing about five pictures of him with my 40-plus close friends and family who follow that social media account. My mother-in-law has been posting pictures of my son to her social media account for a while ...