WARNING: angst, mention of slash and incest
Isosceles
Isabelle doesn't understand why he acts the way he does.
Why love him, she says, when you have someone who already loves you?
Alec just looks at her, and shakes his head.
Isabelle may be beautiful, but she doesn't feel very deeply.
She doesn't understand that Alec can't choose who he loves.
But he suspects Clary does.
He knows that he is not the only person that automatically looks up when Jace walks by.
And he thinks, with a painful smile, it is a pity that they are both forbidden to love.