Write a story that seems normal on first sight , except for one small detail that makes it extremely creepy on a more careful reading [ WP ]

Lucy sat solemnly against the wall, her red hair covering her face while she stared at the living room floor. 
 `` Are you even listening?'' yelled her father, he was drunk again. 
 `` When your mother comes back, she'll be so disappointed. What am I supposed to tell her?'' he sighed. 
 He raised the bottle to his lips, drinking deep as he slammed his hand onto the mantelpiece to steady himself. 
 His hand came back holding a picture, a family portrait. 
 `` Why ca n't you be like this again? Huh? Before you turned to shit.'' he yelled, tapping the picture. 
 He took another swig of the bottle and let it fall to the floor, it cracked but did n't shatter. Part of its content seeped out. 
 The picture featured the man, his wife and Lucy. Nothing but smiles. `` We used to be so happy, but you just had to go and ruin it.'' 
 The man in the image had perfect teeth and dark hair, the mother's face held a warming smile with long blonde hair, the child a reflection of her mother. 
 `` I mean really, what am I supposed to do with you?'' 
 He picked up the bottle and downed the remaining content. 
 
 
 -- -- -- -- -- -- -- -- -- -- -- -- -- - 
 
 I'm really late to the party, I hope somebody reads it and finds the clue: )
