Kitty and notTed, I think you're both dead on about Mom's intentions. She kept the secret about her pregnancy so that Eddie could pursue his own life being a gay man.
When Luke first 'hinted' about the attic, I was screaming "Rory, GO TO THE ATTIC, NOW!" I was sure he would find the Rainbow flag and pictures of Jason and Eddie at a pride parade.
I never suspected that Aaron (the little slut) would be the one to break the news to Rory. The good news for Rory is now he'll have three role models to teach him how to use his 'gaydar' which to date is not turned on .
Once Rory and Luke both realize each other is gay (I think Luke 'suspects' that about Rory) and Rory finds out that cousin Luke isn't really his cousin, they can get in on! Unfortunately, Aaron (the little slut) will use his powers of persuasion and screw things up before that ever happens.
Vic