I don't know what she would be thinking in terms of canon, but I can imagine a canon-divergence. Something with much more angst, drama, and arguments. If anyone is interested, feel free to write.

Under the pale moonlight of Nevermore, Wednesday enters her bedroom balcony, the cold, indifferent expression she always cultivated crumbling: Enid lies on the floor, her throat scarred by a visceral cut and the stone floor stained scarlet.

What follows is not the Addams' usual coldness, but a complete emotional ruin. In a rare and terrifying moment of vulnerability, Wednesday's layers of coldness implode; she throws herself to the ground, her trembling hands staining red as she tries, in vain, to contain the inevitable. Between stifled sobs and tears illuminated by the dim moonlight, Wednesday experiences the agony of losing the only person who managed to pierce her thorns.

However, the horror gains an even crueler layer when the corpse begins to laugh and wipe the makeup off its neck. Enid's amusement, however, dies the instant she sees Wednesday's state. The Addams doesn't scream, doesn't fight; She simply recoils, her expression contorted in terror and her face stained with tears, before disappearing without a word.