Places like second life (second life is NOT adult / sex focused, although I am sure you find some of that going on in there somehwere) and red light center / utherverse have these virtual worlds where you take your animated avatar around to different places, meet other people and do things in these virtual spaces.Some of these virtual worlds are simply amazing, but they do take a good deal of computer resources to run and space to install.
The wife in question may not actually be making love to her husband, and the stories could involve other lovers, either men or women.
It's one of those things that you will likely have to see experience to believe.
Whether or not we have the kind of virtual reality that you see in the movies, or the kind of tactile / touch sensations that penthouse once tried to make happen is up in the air.
You could end up spending a lot of time in the virtual worlds, so it's definitely not something to jump into if you are looking for a quickie!
If you have hours of extra time on your hands you may find that these virtual realms are worth the time to learn.