For Brother after a fight
Bhai, I am sorry I let anger speak louder than our bond. I should have disagreed without disrespecting you. I know the way I spoke was wrong.
For Sister after harsh words
Behen, I am sorry for speaking in a way that hurt you. I made the disagreement personal, and you did not deserve that from me.
For breaking confidence
I am sorry I shared something that should have stayed between us. You trusted me, and I did not protect that trust. I understand why you are upset.
For teasing
I am sorry I kept joking after it stopped being funny for you. I should have noticed the line and respected it instead of trying to get another laugh.
For ignoring them
I am sorry I was distant and ignored your attempts to talk. I know being siblings does not mean I can take your presence for granted.
For not supporting them
I am sorry I was not there for you when you needed me. I cannot change that moment, but I can listen now and be more dependable going forward.