Oh damn, this got completed, well Congo-rats Lobster.  This was one of the few abandoned games I'd go back to from time to time as it was a ton of fun and felt like it actually respected player choice.  
So many other sissification/NTR games just railroad everything into BNWO but it's better when there are options and a variety and Good Son is one of the few that lets you be as dominant or as submissive, as active or passive and lets you 'paint the scene' (as well as your gf and/or yourself) in the many colors and ways that YOU wanted.
As much as I'd love to see Girl Spy make a return now, I'm just happy that this one is actually complete now, so if Lobster decides to make something new or let this be the end of their creative journey then I'm happy I was able to enjoy it.