A Shadowhunter life is never peaceful for long.

Clary, Jace, Simon, and Alec have ventured seemingly past the point of no return to save the ones they love and the entire race of Shadowhunters- the demon realms. But what if City of Heavenly Fire had ended differently? How would their whole world change if they were prisoners of Sebastian before his defeat? How can Clary cope with being her brother's play toy? Clace, Sizzy, Malec, and, yes, Clabastian. Nothing too explicit.

PREQUEL to Experiments. TMI Smut FanFic - Isabelle/Jace (NOT ROMANCE!) - - - - - - - - - - - - - “How about, outside these four walls I’m you’re brother but inside these four walls I’m-“ He quickly pulled her up from the bed and clashed their lips together for a moment of passion before Izzy pulled back. “I’m not going to have sex with you!” “Not sex, and there’d be no feelings involved, it would be purely platonic… experimenting.” “Experimenting?” “Yeah, we could use it as a learning experience, figuring out what feels good and what feels bad. Experimenting.” He finalised with a small nod. “So are you in?”