When is a monster not a monster? Oh, when you love it.
—Caitlyn Siehl
The Curse of a Second Son
A Celiaverse AU.
"The what?" James asked, completely baffled, letting his fork clatter on his plate. The sound was jarring and it made everyone turn to him, while their father grimaced.
"The Peverell- Black marriage contract." The head of the Potter family repeated.
Celia felt dread sink her stomach.
Their parents never brought up family affairs unless they affected them directly. Which meant this could potentially have horrible consequences for them.
"What your father means is that one of you has to fulfil a blood oath that our Peverell ancestors made with our Black forefathers." Their mother said solemnly.
"What does that mean?" James asked, his voice lost the shrillness and the look in his eyes turned serious.
"One of the Potter children has to marry a Black descendant."
All the Black women were already married, and James was courting Lily Evans.
"Why is this coming up now, Mum?" Celia asked.
Their parents shared a long, long look, their eyes communicating a whole conversation without one word.
"Orion Black wants the contract to be fulfiled, Celia." Her mother said.
"Celia can marry Sirius!" James exclaimed, making her cheeks turn crimson at the idea.
"It's not so easy, James," their father sighed, his patience wearing thin. "Sirius was disowned."
It finally downed on them.
It meant Celia had to marry Regulus Black.
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@fromtheboundlesssea