I couldn't leave my comment on your story so I shall leave it here for you to see --

Well described and little to complain about technically, as you are a good writer. I would have loved this to be a bit longer. Perhaps you could take this, draw out the time frame, and add to the foreplay a bit. Extending your scenes would turn this well-written piece into something far better.
I would love to see more from these characters.

Hope that helps you with your writing.