Question juridique clé
Whether the ex-husband's prior agreement to a 'non-reducible' alimony barred any later request for modification or suppression.
Solution extraite
The agreement was binding, but it did not preclude review under the abuse-of-rights reservation of Arts. 27 and 2 CC.
Motifs extraits
Art. 153 aCC is dispositive; spouses may waive modification claims. However, such waiver remains subject to the prohibition of manifest abuse of rights and may be adapted only in extraordinary, unforeseeable circumstances.