This is bad.
Penelope knew that Ethan was angry because he loved her so much and did not accept that his little sister had to get pregnant because of a mistake. Already so, the man who impregnated her was Edmund Gerwyn, a Duke who was hated by Ethan. But Penelope also didn't want Ethan to die in vain because of his carelessness, who wanted to teach Edmund a lesson. Even though Ethan has good sword skills, his skills are still far below Edmund's. And, if Ethan came to Edmund and asked the Duke to duel, wouldn't Ethan have to say the reason behind it? Penelope didn't want Edmund to know she was pregnant!
"Brother Ethan, please just listen to me for a moment!" Penelope pleaded as she held Ethan's arm firmly. Her eyes looked at Edmund with a pitiful gaze and the woman had been holding herself back from crying. "I beg you, don't kill Duke Edmund."