Since Helena came to Leon's birthday party after such an incident, it was clear that she had a reason to attend.
It was a no-brainer.
If even Faye could think of it, it wouldn't be much difficult for her father to think of it either.
After a little investigation, he easily found out about the brief conversation between Vernon and Hubert.
He used his connections to make Hubert leave the city for a few days on work so that he wouldn't be able to meet Helena as she wished.
The 'punishment' he gave Helena was just that. He did not think he did anything wrong.
He just continued to smile as he crossed his arms casually and said, "If that young lady dared to say a word against my wife, then she had to be ready to face the consequences as well. I don't care what she meant when she said those words. It is just a small lesson for her not to insult my wife."