Employing a chastity belt for my spouse, yet encountering an obstacle.

We’re relatively new to this world. We’ve only just begun looking into concepts like these. Primarily, my wife enjoys locking me up for extended stretches (sometimes several weeks). While I’m locked away, I satisfy her orally, but now she’s craving more depth. She feels the need for penetration but refuses to remove my belt since that keeps her aroused. She dropped a hint about cuckolding and clearly got across what she meant; however, even though she is eager for it eventually, she prefers to proceed gradually and let the moment build. So, how should we handle getting that needed penetration while I remain in chastity, right up until she decides it’s time? Thank you.