My photographer boyfriend hid that he did a boudoir shoot.

My boyfriend 27M and I 23F have been dating for a little over a year. He is a photographer and hasn’t done a boudoir shoot before. About 3ish months ago we talked about if someone asked him to do it, if I would be okay with it. I said I wouldn’t necessarily like it but if it did happen I would just want to know and also be there (as an assistant). Well, fast forward to today, I was going through his camera trying to find specific photos he took of me and ended up coming across a lingerie shoot he took a couple weeks ago without telling me. I don’t really know what to think. I haven’t brought it up yet. Any advice on how I should move forward?