After mentioning the topic and showing my cage for the first time some months ago we finally had another talk about it yesterday and my partner agreed to hold my key. She's very vanilla and was hesitant about certain aspects of the whole thing but fortunately very curious and willing to try things that I'm into. She's mostly concerned about missing out on penetration but was open to get a strapon or make me wear a sleeve. I'm beyond excitement about the next week's and how they will feel. The most challenging factor will be my many business trips which can stretch over several weeks during which I'll have to deal with the keys myself, hope I can stay strong for her.