Evolution of distance between different objects of multiple stellar system. Upper panel: difference between sink A and B in x (black solid line), y (red dashed line), and z (magenta solid line), as well as the difference between sink A and C in x (blue dotted line), y (cyan dash-dotted line), and z (green dashed line). Middle panel: absolute distance r between sinks A and B (black solid line), sinks A and C (blue dotted line), and sinks B and C (red dashed line). Lower panel: accretion profile for the three sinks involved from t = 35 × 10³ yr to t = 90 × 10³ yr after formation of the primary. The black solid line represents the primary A, the blue dotted line corresponds to companion B, and the red dashed line corresponds to companion C.