The comment touched a tender spot. My son is an only child, and I deeply regret that. Far more often than I care to admit, I let him play video games or watch TV for longer than I intended. Any mother who works at home, or is single, or is married to someone who works long hours knows that this kind of bargaining is often the only way to get things done at home or to meet a work deadline. Along the way, I have been blindsided by the guilt of bringing a baby into the world without also giving him a sibling, a partner to share in his life journey.