ARGHH NO I WANTED TO LIKE HIM WHYY?! CAN NOVEL READERS SPOIL FOR ME WHAT HIS PERSONALITY IS LIKE PLS?
He's not in love with Penelope, he's obsessed with her. He wants her to trust and depend only on him.
So when Ivonne told him the best way to have Penelope for himself is to bring Ivonne back to fl's family (and therefore make the Duke and the brothers ignore and mistreat Penelope again and then Penelope would only trust and depend on him), he did what Ivonne told him without a second thought.
There's something about the main characters that make them all annoying