The Escapist : News : Rumor: Game Sharing Coming To Steam
So it looks like there's some indication that game sharing might be a thing coming to Steam. Not going to lie, if this is true then that's damn cool. Just make sure Pike's not playing a game before "borrowing" it or you'll never get to play.
UPDATE: Steam Game Sharing Begins Limited Beta Soon | The Escapist
Not actually a rumour anymore. Limited Beta starts next week. Quick everyone, friend Pike so you can play her games.