ANSWER:
If you haven’t done anything wrong to him, these curses won’t have any effect.
https://www.assimalhakeem.net/sheikh-whenever-my-mother-gets-upset-even-for-a-small-thing-she-could-speak-ill-towards-us-hurtful-things-how-can-we-stop-her-from-this-even-if-we-try-to-tell-her-nicely-if-she-is-not-angry-or-shar/