Wonderful story, I totally loved it! And congratulations on the win :)
I do have a critique if you don't mind. I think there may be a typo mistake. There is a repeat of lines with the second line having three extra words. I'm not sure which one you chose to use.
'You are just doing it so you can grope me when we're downstairs, in the changing rooms,' Severus said, not minding at all. Remus' alpha wolf pushed all the buttons that the dominant Remus did. A wall and an empty changing room was all Severus wanted now. And Remus, of course.
'You are just doing it so you can grope me when we're downstairs, away from the crowd,' Severus said, not minding at all. Remus' alpha wolf pushed all the buttons that the dominant Remus did. A wall and an empty changing room was all Severus wanted now. And Remus, of course. Hard and fast.