We get flirty and playful Olivia so rarely that I worried that I had her out of character when I first posted the fic. That scene really made me happy to see, because I think it was one of the strongest hints of what Peter and Olivia might look like when they're happy. I also suspect it's the last happy bit we're going to get for a while.

I suspect Olivia will be the reason Peter will stay when he finds out about Walter's misdeeds. (Actually, I suspect that's why we got the opening gambit in Peter/Olivia now, to show that he has reason to want to hang around)