Every night, without fail, after dinner, Danielaโ€”my new daughter-in-lawโ€”would go into the bathroom and stay there for over an hour. The sound of running water was constant, and a strange scentโ€”a perfume I didnโ€™t recognizeโ€”faintly drifted under the door. At first, I just found it odd. Then it bothered me. And finallyโ€ฆ I got suspicious.

Daniela had been married to my son for a little less than three months. She worked as an office assistantโ€”polite, kind, and always soft-spoken. My son, Leonardo, was a civil engineer and frequently traveled to construction sites in other states. Sometimes heโ€™d go a whole week without returning home.

At first, I was very happy with her. She cooked well, got up early to clean, and always left for work on time. But something started to bother me: every night, Daniela spent an unusually long time in the bathroom. It wasnโ€™t 30 minutesโ€”often an hour or more.