YAY! They're finally getting down to the "real sex" (oh, Teddy! :D)! I love how Remus's feelings are showing through more than ever, and the bittersweetness of the moment. I AM kind of wondering whether it will be the closure they're hoping for, but hopefully it will be. It does seem like it should be - Teddy and Remus's lovemaking here has something of a feeling of something that's already ended even though it's the first time, while Teddy's experimentation with Andrew (and I LOVED the nipple clamp scenes!) feels like it still has a long way to go. I really like how you're painting the different relationships with different brushes.
Can't wait for the next one, though I'm sorry it will be the last! :)