Last night I came so hard I had to bite my own arm to stay quiet.

I was on my knees in front of my bedroom window, fingers buried deep inside my soaked pussy, watching Marcus fuck Lila against the glass door of their living room. The way he had her pressed up against it — her tits flattening on the glass, his hand around her throat, hips snapping hard enough to make her whole body jolt — it broke something in me. I came watching them, whispering both their names like a prayer I wasn’t allowed to say out loud.

They’re married. Happy. The perfect couple next door.

I’m...