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im sorry little one
I'm regretful about the little one.
I am regretful about your child. I know how difficult this situation can feel. I urge you, receive my sincere apologies.
I feel regretful about your child. I understand what challenging this situation can feel. Please, accept my heartfelt condolences. I genuinely regret the trouble brought about. I feel anticipating that the little one will forgive me.