The thought of Kenshin going to fight her husband send a thick wave of fear through her. "You do not need to face him. He'll give up eventually, he has to." He wouldnt and she knew it, but if Kenshin went to fight, he would die.
"I care for you as well Kenshin and I cannot live with the idea of you being hurt again like that because of me. He's not a simple man and he will not be honorable in how he would face you."