does anyone else has this fantasy?

i like to imagine someone walking into our room seeing there my naked wife...
Having your own fa...or bro... see her like that? Knowing that they're getting off to the sight of her naked and vulnerable?
And then maybe one day they'd want to join us in bed....
The idea of someone close to me seeing her like that just gets me so worked up. It's like this deep-seated desire to share her with others...
You know what I mean?