My hands still tremble when I think about that night.
It was supposed to be a celebration of new life, a joyful family gathering.
Emily, my younger sister, was glowing.
She’s due in just a few weeks, and we had spent months planning her baby shower.
Our house, the one Mark and I had built together, was filled with balloons and laughter.
Guests overflowed from the living room onto the patio.
There were mountains of tiny onesies and adorable baby toys.
Everywhere I looked, there was joy, there was family, there was love.
Mark, my husband of seven years, was being his charming self.
He helped serve drinks, joked with our relatives, and even made a sweet toast to Emily and her upcoming motherhood.
He squeezed my hand a couple of times, giving me those familiar, loving glances that always made my heart flutter.
Emily looked so happy, clutching her belly, surrounded by everyone who cared about her.
My sister, my best friend since childhood, was about to become a mom.
It felt perfect.
As the evening wound down, guests started to leave, their cars pulling away one by one.
Emily was exhausted, her swollen feet aching.
"Stay over," I insisted, "It's too late for you to drive all the way back."
She hesitated, then agreed, grateful for the offer.
We set her up in the guest room, a cozy space with a soft bed and blackout curtains.
Mark brought her a glass of water, and we wished her goodnight.
"Sleep well, Em," I said, giving her a hug.
"Thanks, you two," she mumbled, already half-asleep.
Mark and I then cleaned up the last few dishes, the silence of the house a stark contrast to the earlier cacophony.
I felt content, tired but happy, savoring the peaceful end to a beautiful day.
"I'm heading to bed," I told Mark, giving him a quick kiss.
"I'll be up in a minute, just going to double-check the locks," he replied.
I went into our bedroom, slipped into my favorite silk pajamas, and slid under the covers.
The sheets still smelled faintly of our laundry detergent, a comforting scent.
I closed my eyes, drifting into that peaceful space between wakefulness and sleep.
Minutes turned into what felt like an hour.
Mark still hadn't come to bed.
A tiny knot of unease began to form in my stomach.
He usually didn't take this long.
I opened my eyes, the room bathed in the soft glow of the streetlights outside.
"Mark?" I whispered, my voice barely audible.
No response.
I got up, pulling on my robe, a sudden chill running down my spine.
The house was quiet, almost too quiet.
I padded softly down the hallway, my bare feet silent on the hardwood.
I checked the living room, then the kitchen.
Nothing.
Then, I heard it.
A soft murmur, a low, intimate laugh that wasn't mine, coming from the guest room.
My heart leaped into my throat.
Confusion, then a cold dread, washed over me.
Emily's room.
Why was Mark in Emily's room?
My hand instinctively went to my chest, my breath catching.
I crept closer, my blood pounding in my ears.
The door was slightly ajar, a sliver of warm light spilling into the dark hall.
I hesitated, my mind racing, trying to rationalize it.
Maybe Emily needed something?
Maybe she was sick?
But the sounds weren't sounds of distress.
They were… too gentle.
Too personal.
With a trembling hand, I pushed the door open just a fraction more.
