Introductions discussion

Hello all. I could use some advice here. My wife, who holds the key, and I have just begun exploring chastity devices in early October. Up to now, my longest stretch has been a single week at a time. I don’t want to pressure her too much, but I’d like to stay locked for longer than seven days. However, I hesitate to bring it up because I fear she might lose interest in our new dynamic if I do. I would love for her to introduce more punishments and tease me a bit more often. She has mentioned that when she decides she wants something, there is nothing I can do about it. Does anyone have any ideas?