This was simply an amazing read.
First of all, I was impressed by how you were abel to include a love letter without it being incredibly sappy and badly written. And when Remus gave Sirius the letter and left, I had butterflies in my stomach, understanding completely the feeling Remus was having at the moment. When Sirius comes to Remus afterwards and seems so happy, I thought it was going to be a happy ending, with no complications, but I didn't mind, because the story had been so well written that I would have loved it anyway.
However, the plot twist you add is so unexpected and great, it leaves me feeling sad for poor Remus, and happy for what a great fan fiction I had the pleasure of reading. I absolutely loved this. :)
Author's Response: I'm not sure it's possible for me to write a romance with no complications. I don't think I have the fluffy gene. I'm flattered you enjoyed the story so much. Thanks for reviewing.