Not bad. Where does the really saucy material come in?

8257895
About saucy material, you mean sex or other mature scenes?

8259423
Well, that and the more mature side of a romance.

8259438
In the next chapter sex will not happen, but some kind of tease yes. But in the next chapters its a little questioning.
But they are rommates and they are alone most of the time. And Fluttershy can tell, that sometimes the calm room can turn into be more... Let's say: loud and fun activities. And with Dash, its not rare.

Will you ever see one of them getting pregnant via a donor?