“What's this?" he demanded, looking from Clary to his companions, as if they might know what she was doing there.
"It's a girl," Jace said, recovering his composure. "Surely you've seen girls before, Alec. Your sister Isabelle is one.”
    
    
    
        — 
        
            
                Cassandra Clare
            
        
        
            
                
                    , 
                
                
                    book 
                
                
                
                    City of Bones
                
            
        
        
    
    
        
        
        
            
            
        
        
        
        
        
        Source: City of Bones
        
            
        
        
        Last update June 3, 2021.
         
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"It's …" by Cassandra Clare?