Under the guise of a routine flight check, Nidec's sister and brother find themselves in the cramped cockpit, their bodies pressed close in the confined space. The hum of the idling engine echoes their racing hearts. She reaches out, tentatively touching his growing bulge. He groans, his hips bucking slightly. Encouraged, she unzips his fly, revealing his thick, veiny cock. She strokes it, feeling its heat and pulsating life. He turns to her, his eyes filled with a mix of lust and fear. She leans in, taking him into her mouth, tasting his salty pre-cum. He fists her hair, guiding her as she sucks him off, her head bobbing in rhythm with the aircraft's gentle vibrations.