A quick drabble on the scene where Sirius shows Harry the Black family tree, and remembers his past relationship with Narcissa Black.
TW: Incest
OoO
"That's my cousin Andromeda, burned of the tree just like me." Sirius pointed at another burned spot at the wand carpet, then traced the line to two small pictures. "And Andromeda's sisters. Bellatrix and… Narcissa. Both of them made lovely respectable pureblood marriages."
Narcissa had him pressed against the wall of an empty corridor, her lips lightly brushing against his own as she smirked playfully. She leaned into him, her short hair tickling his face as she kissed him once more.
Sirius tugged their hips closer together, smirking at his cousin. She immediately deepened the kiss, parting her lips slightly to allow his tongue to pass them as he kissed her with more passion.
"You like this too much, Black." The blonde kissed up his jaw to his ear and hissed the words in a low voice, eyes glancing down with a smirk to his boner pressed against her thigh.
On his turn, Sirius let out a soft moan and captured her lips again before pulling away only slightly, his hand trailing down to teasingly stroke her own. "Oh certainly, but so do you, Black."
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They were curled up under crimson red blankets, Narcissa's head resting peacefully against Sirius' chest. He combed his hands calmly through her now longer hair, pressing a kiss to her forehead every so often as she did so.
The dormitory was empty except for the two of them, their hands entwined in complete silence. Eventually it was Narcissa who broke the silence, tilting her head to look up at the younger student as she whispered "I'm in love with you, Siri…"
At first Sirius grinned, sitting up and pulling her closer to him "I'm in love with me too, Cissa." He pecked her lips, laughing as she playfully pushed him away. The boy nuzzled her neck with a smile and muttered "Merlin I love you, I'm head over heels in love with you, Narcissa Black."
She let out a shrieking laugh when he pushed her down onto the bed, tickling her side with a grin before suddenly capturing her lips in a passionate kiss, pulling the girl into his lap smirking.
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"They've arranged for me to marry."
Narcissa stood facing the window, her back turned to her cousin so she wouldn't be seeing his face as she told him this. "A few months after my graduation they'll marry me to Lucius Malfoy."
She said it fast, cold almost, before turning back to Sirius with a worried frown. His face had fallen and he crossed the room to wrap his arms around the petite girl's waist. "Why- they can't just do that! They can't-…" his anger was soon replaced by tears in the corner of his eyes and a tight hug.
She hugged him back, her arms wrapped tightly around her younger cousin as she shook her head slightly. "They have… I can't do much against father's word…"
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"That's why they're still on the tree." Sirius finished, nodding at the two portraits and then looking at his godson with a half grin. "A complicated family, that was."