his/her offer
Je pense qu'il était normal qu'elle refuse son offre.
I think it was understandable that she turned down his offer.
Je ne vois pas de raison pour laquelle je ne devrais pas accepter son offre.
I see no reason why I shouldn't accept his offer.
C'était idiot de ta part d'accepter son offre.
It was foolish of you to accept his offer.
Vous auriez dû décliner son offre.
You should have declined his offer.
Tu aurais dû refuser son offre.
You should have refused his offer.
Vous avez été sages d'accepter son offre.
You were wise to accept his offer.