The content of the apology message sent to the son-in-law is that I sent you a message today and sincerely apologize to you. I'm sorry, I was wrong. I should have apologized long ago, but

It feels a little stiff, like reading a manuscript, you can write his name,

Dad apologized to you. I was really impulsive that day. I really regret it afterwards. I wanted to apologize to you a long time ago, but I never had the courage to say it. Now I think, since I was wrong, I have to admit it myself. Let the children forgive my father.