Before the World Catches Up, by Mia_Zeklos

“You can’t guard my door all night,” Jace countered, but let Alec get him through his bedroom door with minimum protest. 

“I will if I have to,” Alec said as he pushed Jace towards the bed. And he would, Jace realised; he’d stay by the door just to make sure that Jace felt safe, no matter what it cost him.

Adult, post-season 1 divergence. This is utter perfection, I’ve fallen in love with everything about it, from the bedsharing to the office sex.