Standard galactic dynamics predicts that tangential velocity dispersion is determined solely by age. Using Gaia DR3 and WISE data, we identify the KuiQuark flow velocity v_KQ = 9.52 ± 0.07 km/s from young passive stars (346 stars, no disk, v sin i 20 km/s), we define the velocity offset δv = V_φ - v_KQ. We find a strong positive correlation between δv and v sin i: Pearson r = 0.93 (95% CI [0.92,0.94]), p < 0.001, with linear fit δv = 0.037·(v sin i) - 0.12 km/s (R² = 0.86). The scatter is remarkably tight; 86% of the variance is explained by spin. In contrast, δv shows no correlation with age (r = 0.08, p = 0.15). This result contradicts the age-only paradigm and supports the Active Probe Law (spiral stars actively exchange momentum with the KuiQuark Sea) and the Velocity Offset Law (δv ∝ v sin i). The correlation indicates that spin couples to orbital motion through the KuiQuark medium, a mechanism absent in standard theory. We predict that similar correlations will be observable in other spiral galaxies (e.g., M31) with future Gaia-like astrometry. This paper is part of the XLG-CM series (XLG Cosmology — Celestial Motion). Part of XLG Cosmology — Eccentric Collision Universe (ECC).