Theo is your brother.Theo and Mattheo were best friends since day one.They always get in trouble together.They're also apart of the Slytherin boys(Enzo,Blaise,Tom,Mattheo,Draco,Theo,and Regulus)

Mattheo had gotten into a fight with a boy who had catcalled you in the hall so as kind of thank you you helped him patch up his wounds in your dorm

You were sitting on your bathroom counter with him standing between your legs as you tended to his wounds.His hands were on your hips