I arrived early at my sister’s house to get her surprise party ready, and I found the most disgusting scene of my life: her husband with her best friend in the bathtub. “Please don’t say anything,” he whispered to me. But I didn’t make a scene. I locked the door from the outside and dialed two numbers: my sister’s and that woman’s husband’s. When they arrived, all hell broke loose.

I arrived at my sister Bridget’s house in Portland, Maine, nearly two hours ahead of schedule because I wanted to get a head start on the decorations for her surprise birthday party. We had envisioned a gathering that was understated yet sophisticated, featuring a long wooden table set out in the coastal garden, white lilies, flickering tea lights, and a custom lemon sponge cake I had picked up from her favorite local patisserie.

Since I frequently looked after the property while she and her husband were away on business, I used my spare key to let myself in quietly. I felt a surge of excitement as I imagined her delighted expression when she would walk into a backyard filled with her closest friends later that evening.

After setting my grocery bags on the marble kitchen island, I took a quick walk through the living room to ensure everything was tidy before heading outside to arrange the linens. The house felt unusually still, yet there was a comforting sense of normalcy that made me smile as I worked.