The bestow curse spell states:
[…] While the target is cursed, your attacks and spells deal an extra 1d8 necrotic damage to the target. […]
I’m wondering how this interacts with the dragon’s breath spell which grants a creature you touch a new action to create a damage-dealing area of effect. Does this count as your spell dealing damage and thus activate hex? If note, does this change if dragon’s breath was originally cast on yourself?