The fertile window alert on the app had turned their secret encounters into something almost ritualistic.

That evening, after Victoria had gone to bed, Marcus led Elena into the guest room once more. The moment the door locked, the air thickened with intent. No words were needed at first. They undressed each other slowly, hands exploring, lips brushing skin. When Marcus laid her on the bed and settled between her thighs, he entered her with one deep, purposeful thrust.

They moved together in a rhythm that felt ancient and new all at once — long strokes, grinding hips, bodies pressed as close as possible. Elena’s legs wrapped high around his...