Long-term tidal evolution of the inner orbit of the KOI-1257 system with Q = 3 × 10⁴. We show the evolution for two sets of initial conditions taken from Fig. 12, one starting in libration a) and the other starting in circulation b). In both simulations the present configuration can be maintained for at least 0.5 Gyr, after which time the planet evolves into a regular hot Jupiter in a close-in circular orbit.