2. As is listed in the OP/Genre section, the author describes the current circumstances as "Sharing fantasy". In a previous post he said there would not be any actual sharing (I presume, intercourse, etc) until the second installment in the series. I personally find this decision disappointing, but it's his game and I can live with it.
So for now all we have is light touching (swim lessons), exhibitionism (bar, park, etc) and will have to wait for more. He has also stated that there will be choices given so as not to force the route on anyone.