A simulation of the future evolution of the orbits of Naiad, Thalassa, and Despina assuming equilibrium tides within Neptune with a constant Q_N/k_2N = 3.3 × 10⁴. The top panel shows the semimajor axis of Thalassa (green) as well as the location of the currently active 69:73 MMR with Naiad (purple; approximately (73/69)^2/3a_ν) and the 29:27 resonance with Despina (cyan; approximately (27/29)^2/3a_D, with a resonant argument of 29λ_D − 27λ_θ − 2Ω_θ). The bottom panel shows the resonant argument 73λ_θ − 69λ_ν − 4Ω_ν of the Naiad–Thalassa 73:69 resonance. The Naiad–Thalassa resonance is perturbed about 430 kyr into the simulation due to Despina’s resonant perturbations, and finally breaks around 800 kyr.