Okay, after a little research, Malec does happen in City of Bones. Well their first kiss happens.
BUT GUESS WHAT.
we don’t know that it happens.
Why? Because it was a secret. It wasn’t written in City of Bones, and all we knew was that Alec had a hickey on his neck in City of Ashes. So, no….
I don’t have my book with me so I can’t give you and exact, but like I said earlier, the end scene in the book where Magnus comes to save Alec. Why would he be in a frantic rush to save a complete stranger? We’ve seen the way he treats others, how he treats golden boy Jace, so why would he care if his brother’s life is in danger? They’re not friends and like you said their only exchange was secret.
Malec is about the relationship between Magnus Bane and Alec Lightwood. It doesn’t have to be about them making out in some corner like Clary and Jace.
Fans are excited because they WONT be taking it out. That we’ll see Magnus hitting on Alec, that we’ll see him tire himself out to save him because he cares. It does happen. This is where it starts