My sister left her six-month-old baby with me and casually went out with her husband. Twenty minutes later, the baby wouldn’t stop screaming, and when I checked her, I found a bruise hidden beneath her diaper.

“She was perfectly fine when we left,” my sister insisted when she arrived at the hospital.

I looked at her and said, “No. She was already in pain when you left her with me.”

Then a social worker asked to interview us separately. That was when I realized someone was trying to make it look like the baby had been hurt during my time alone with her.

PART 1

“If Sofia gets too upset, you decide if she needs a doctor. You’ve always been the one who knows when to stop waiting,” my sister, Mariana, told me as she placed her six-month-old daughter into my arms.

At that moment, I took it as a compliment.

Mariana and her husband, Rodrigo, were spending the morning at a shopping mall about forty minutes away in suburban Chicago. They told me they needed to pick up a few things, eat a quiet lunch, and decompress. Sofia had slept terribly, was irritable, and according to Mariana, it was “definitely just teething.”

Twenty minutes after they pulled out of my driveway, the baby started screaming.

It wasn’t a tired cry. It wasn’t hunger, either. I offered her a bottle, held her against my chest, paced around the living room, and sang to her. Nothing worked. When I tried to shift her slightly lower in my arms, she let out a shriek so sharp and high-pitched that it froze me in my tracks.

I rushed her to the changing table and gently unbuttoned her onesie. Her right leg was kicking normally. Her left leg wasn’t moving at all.

When I pulled the edge of her diaper down just a fraction, I saw a deep purple bruise high up on her left thigh, half-hidden by the elastic band. It wasn’t a mark from her clothes. It was swollen. Her two legs no longer looked the same size.

My stomach plummeted into an abyss.