Possible first time cuck?

Wife(33f) and I(30M) have been discussing and lightly flirting with the idea of swinging over the past 2 years. We do have a couple we lightly flirt with but nothing has gone beyond that due to daily life schedules. However I have a fantasy of her being with another man and me staying home while he and her basically send me pics and videos of their encounters. She is open to that but we agreed it should be more of a stag/vixen situation and not cuck/hotwife. However... My birthday was a few days ago and our friends we flirt jokingly got me a chastity cage because they know about mu fantasy. Well today I tried it on cause my wife has always wanted to see one in real life. She loved it, I could see the excitement in her eyes and I found it quite fun myself. Anyways...she told me that she would want to go out soon and have a little hook up while I stay home but wants me in the cage while she is out so that I am unable to relieve myself to the pictures and videos she sends, wants to come home and tell me all about it while she plays with herself in front of me. I have some mixed emotions because im not the type of guy who has ever considered wearing a cage or being a cuck but when she told me about her fantasy, it immediately got me hard and made me want it so bad. So I was hoping to get some advice on how to approach this. Should I baby step this idea? Should I just give in and let her have her way? The idea of her being in control and having the power over me is hot, im not sure where to go from here or how to handle it.