"Father, we apologize... We didn't mean to be that mean, here is our apology letter! Hope you forgive our terrible actions at the hospital and previously." They hurriedly spoke up when they noticed their father was looking in their direction! They spoke up from the floor, looking like they had admitted their mistakes.
If they earnestly apologized, maybe he would forget that idea of taking them over to a boarding school. So, they had to be sincere and express themselves from the heart.
