The house was too quiet. Neil was off on another business trip—always working, always distant—and the kids were staying with friends for the weekend. The emptiness gnawed at me, so when Sarah and Gemma texted about a girls’ night out, I didn’t hesitate. A drink, some laughter; maybe it would dull the ache of a marriage that felt more like roommates than lovers anymore. The pub was lively, music thumping under chatter and...