you and Spencer were secret lovers and only Derek knew after catching y'all in bed together and promised to keep it a secret

Y'all had a case and the unsub snuck up behind you covered your mouth and took you to a warehouse and disarmed you, beat you. You woke up with your hands chained above your head your feet dangling in the air your clothes ripped so most your skin was showing

The unsub started recording and Reid and the team was watching the unsub doing bad things to you as he cried and screamed at everyone for not being able to help you

"Spencer Reid, my hostages lover. You and your team let me go free and you'll get your liver back or..." He says with a grin moving behind you lifting your shirt as you squirm "I'll do whatever else I want with them"