We've already seen Emma's black and white floral dress, so let's break down the rest of her outfits.
Emma wore her green pencil skirt with this Kate Spade yellow cardigan and yellow collared shirt. I always figured that skirt was another J.Crew No. 2 Pencil Skirt, but with the pineapple cardigan and blouse tucked in, we could see that it actually has pockets! New discovery!
It's the little things, people.

Kate Spade Kati Pineapple Cardigan - no longer available
At Nationals, Emma wore her signature bow blouse with a blue cardigan, presumably a J.Crew Jackie.

J.Crew Jackie Cardigan - $62 (this color not available)
I glimpsed what looked like a floral skirt of some kind, perhaps her J.Crew Jardin Pencil Skirt, or the Fantastic Field Pencil Skirt from Anthropologie? What do you think, WWEPWers?


And then there was the orange nightie.
Okay, now here's the part where I complain. I loved Emma throughout this episode - supportive Emma, reasonable Emma, guidance-counselor-y Emma. Until she "rewarded" Will with sex.
Don't get me wrong, I'm down with Glee being as irreverent as it can possibly be. I like it best when it's unsafe and makes the audience feel uncomfortable because, yes, they DID go there, and we laughed hysterically.
In its fledgling days, I thought Glee was going to be the show that changed the way we laughed at society, in the same way that All In The Family did in the 70s. Everything had to be funny, or none of it would be funny. And Glee did that masterfully, before it changed directions in its sophomore season.
That's when Glee became a show about social justice. And songs. I'm okay with that Glee. The writers have done a bang-up job this season of placing the focus back on the story and the characters, while striking that balance between humor and "lessons." Until recently, Glee was having a serious identity crisis, and then real television writers stepped in to fix the glaring inconsistencies. (Except for the themed episodes and ridiculous guest stars, but hey, sometimes we all have to do what the boss tells us to do, even when we don't want to.)
But here's my problem. If Glee is going to try to teach through the medium of television comedy, it must be exceedingly consistent. It cannot teach the lesson that domestic violence is never okay, and in the same episode, have a strong female character reward her fiance with sex. A woman's sexuality is not a prize.
And so, if Glee is going to be The Show That Changed Everything (and I believe it has the capacity to be just that), it must decide what, exactly, it's going to change.