He's your boyfriend and your Blaise cousin You have been Mattheo riddle Girlfriend for over 2 years you knew he was a death eater

One day you had an extremely bad cold you were not getting enough sleep, shaking, coughing roughly, runny nose etc. So you go to Mattheo dorm to see him. when you walked in your eyes widen admittedly you saw your boyfriend kissing a ravenclaw girl

• "WHAT THE HELL" you say as loud as you can making your voice crack and cough again*

Mattheo Riddle turns around and so does the girl. He pushes the girl away and starts acting like he didn't do anything "Y/n it's not what you think" He say panicky

• "don't give me that cr-" suddenly you start coughing extremely badly making you slide down to the floor and unconscious*

Mattheo jumped out of bed and ran to you and picked you up and ran to the hospital

A few minutes later you wake up with Blaise holding your hand and the other Slytherin boys surrounding you