"Ah," Antonin said with a sad smile, "your siblings were unpleasant, and your house full of them, so you assume every house full of children must be miserable. From what I've heard of you, Mr. Weasley, it is most unlike you to make that sort of a leap of logic."
"And if you feel so strongly that this Miles Bletchley is such a problem, why don't you just take him out? That way, his child could be raised in an enviroment more suitable to bringing up a useful adult."