NSFW. How do I get over the guilt?

Throwaway account. My wife (F27) says she is okay if I (M27) have have relations with someone else as long as I am only doing it to get off sexually. She is only okay if it’s random, no prior/existing communication between the random and I. She said she wants to know all about it afterwards and wants videos/FT of it.

My issue of it all is that I would not be okay with her doing any of that and I feel like I would feel guilty if I did those things, even though she is okay with it. I have not partaken in any of it yet but I am very open to things sexually. We have talked about having threesomes, exhibitionist things, etc. I would like to do these things because I know she will enjoy it as well and I think I would also enjoy it but need to get over this hurdle first. Any thoughts?