As explained in the first lines of the game's page, there's no sex in the game.
Who knows for the future builds though?
Viewing post in Rings Of Titeia - The Ava Build comments
I already thought about it, and I think it's a great idea!
That said, it's not a priority for now because making new complex animations takes time (days at least, most probably weeks), and time spent drawing them is time I don't spend making the game move forward, unfortunately. But I really consider making it for the final product!