“YOU TOOK BLOOD FROM A BABY?!” I screamed when I discovered my best friend Ashley’s sickening secret. She smiled and whispered, “Newborn blood is the secret to staying young forever.” Five years in prison didn’t stop her obsession—and when I woke up to find her standing inside my bedroom, she hissed, “Your DNA is the final ingredient I’ve been missing.”

At 6:42 p.m., I returned to the living room and found my best friend holding a stained cotton pad beside six-week-old Oliver’s foot. He was crying so hard he could barely catch his breath.

“Ashley,” I demanded, “what did you do to that baby?”

She looked up without a trace of shame. “Newborn blood repairs aging cells, Megan. I only needed a little.”

I was thirty-one, living in Pittsburgh, and babysitting Oliver for my coworker Rachel while she attended a medical appointment. Ashley had stopped by with takeout. I had trusted her for twelve years; I had left her alone with Oliver for less than a minute while I warmed his bottle.

I pulled him into my arms, called 911, and followed the dispatcher’s instructions until paramedics arrived. Ashley kept saying, “You’re overreacting,” as though I had caught her borrowing lipstick instead of hurting an infant.

Her obsession had begun innocently, with Korean skincare routines and expensive facials, neither of which had anything to do with what she was doing now. Over the previous year, she had fallen into online forums promoting fabricated claims about blood, youth, and cellular regeneration. At thirty-two, she inspected her face in every reflective surface and called ordinary wrinkles “evidence of decay.”

I had finally stopped inviting her to sleep over after noticing things missing from my bathroom trash. I thought she was searching for discarded cosmetics.

When investigators searched her apartment, they found my used menstrual products stored in labeled bags, pictures of Oliver taken without Rachel’s knowledge, and notebooks describing experiments on herself. Ashley had treated my body, and then a child’s body, as materials she was entitled to collect.

Oliver survived without permanent injury, although Rachel would never again feel safe leaving him with anyone. I testified at Ashley’s trial, listening as her attorney argued that she had lost touch with reality. The court nevertheless found her responsible for her actions, and she received a five-year prison sentence for assaulting the infant and related offenses.

I moved apartments, changed my phone number, and tried to turn twelve years of friendship into something that had happened to another woman.

Four years and eleven months later, an envelope arrived with no return address. Inside was a photograph of Ashley and me at twenty-two. My face had been circled in red ink.

On the back, she had written: “I finally know why you never age.”

Ashley was due for release the following week.

I took the photograph to the police. Because Ashley had been prohibited from contacting me, an investigator documented it and contacted her supervising agency. Nobody could prove she had mailed it, and I was told to report anything else immediately.

For three quiet weeks, I almost convinced myself that she had changed.

Then my neighbor asked whether I knew the woman who had been standing outside my building every morning. The building’s camera showed someone in a baseball cap watching my windows, leaving whenever residents approached. Her face was partly hidden, but her walk made my stomach tighten.

A day later, a bouquet appeared outside my door. It had no card, just strands of hair twisted around the stems. I called the police again, installed an additional indoor camera, and began sleeping with my bedroom door locked.

Ashley had written me letters from prison, none of which I answered. In them, she claimed other inmates had given her blood for “skin trials” and that the resulting infections were temporary proof her research was working. I had no way to verify everything she said. The last photograph she sent showed scars around her cheeks and jaw that she called “the price of discovery.”

There was nothing scientific about it. She had turned ordinary beauty anxiety into a belief that other people owed her pieces of themselves.

Rachel, whose son was now nearly six, came over when I called her in tears. She stayed while I packed a suitcase, and she asked the question I had avoided since the hospital.

“Do you think she chose Oliver because she knew you were caring for him?”

“I don’t know,” I admitted. “And I hate that I might never know.”

Rachel stared at the photograph of our old friendship. “You keep searching for the person she used to be. What if that person wouldn’t recognize who she is now?”

That night, I slept at Rachel’s house. The next morning, my landlord called: someone had tried to enter my apartment, and the hallway camera captured a woman with visible facial scars turning toward the lens.

Police were searching for Ashley when I returned with an officer to collect my medication. We found the apartment empty, but my bedroom mirror had a message written across it in lipstick:

“Your hair. Your skin. This time you can’t say no.”

I thought the officer beside me was the only person who had entered.

Then someone spoke from inside my closet.

“Don’t scream, Megan,” Ashley said. “I’m almost finished.”

The closet door opened, and for a second I barely recognized her. Scars pulled unevenly across her cheeks; her hair was cut short, and her eyes darted from me to the officer in the hallway. In one hand she held a bag containing strands of hair taken from my brush. In the other, she clutched a bundle of small containers.

“You have what my body is missing,” she whispered. “I compared our pictures for years. Your cells are the answer.”

The officer ordered her to put everything down. Ashley dropped the containers, then rushed toward me, grabbing my sleeve and demanding that I let her take “one last sample.” I stumbled against the dresser, pulling free as the officer stepped between us and called for backup.

She kept shouting that I was condemning her to grow old. No one in the room mentioned beauty treatments; this was no longer a misunderstanding between friends, if it ever had been.

Police arrested her for violating the no-contact order and the break-in. My cameras and the building’s hallway footage helped establish how she had entered, while her letters and messages supported a stalking investigation. Prosecutors brought burglary, stalking, and attempted-assault charges. During the proceedings, a court-ordered evaluation addressed her mental health and ability to participate in her defense.

Months later, she pleaded guilty to burglary and stalking under an agreement that included prison time and a requirement for mental-health treatment. Nothing about her obsession had made her experiments real, and no court treated her claims about rejuvenating blood or DNA as science.

Rachel attended the sentencing with me. She said she wasn’t there to see Ashley humiliated. She was there because her son, now learning to read, deserved to grow up knowing that what had happened to him was wrong and that adults had finally made it stop.

Ashley looked at us once. “Megan,” she said, “we were sisters.”

I remembered the girl who had slept on my dorm-room floor, held my hand after my father died, and laughed so hard she cried when we made terrible pancakes at midnight. That friendship had been real. So had the harm she caused.

“We were friends,” I answered. “That never gave you ownership of me.”

Outside the courthouse, Rachel squeezed my hand; neither of us called it closure, but we could finally breathe.

I still use the same simple moisturizer I bought before any of this happened. Occasionally someone asks whether I am afraid of aging, and I think of Ashley’s face, her letters, and Oliver crying in my living room.

What frightens me is not getting older. It is the ease with which someone can start calling cruelty an experiment—and expecting the people who love them to cooperate.