Disclaimer: I Do Not Own Harry Potter.
Pairing:Narcissa/Astoria
Narcissa knows that lusting after Astoria is wrong, but she can't help herself. She's so young and beautiful with lips that should be kissed.
And her lips are being kissed, but by Draco, Narcissa's son. Narcissa is jealous that her son gets to be with Astoria and she doesn't.
Sometimes she thinks that Astoria knows the things that Narcissa thinks about her and taunts by being overly affectionate with Draco or wears something that shows just enough cleavage to feed Narcissa's imagination.
Other times she thinks that Astoria is completely clueless about the whole thing.
Narcissa doesn't know what's worse Astoria having absolutely no idea or Astoria knowing and teasing her with something she can't have.
Draco thankfully remains utterly oblivious to the fact his mother is lusting after his wife.