Daniel felt no pity for Robin seeing him shed tears in front of him for the first time. Robin made an unpardonable mistake.
Even if Sabrina was not the one who saved his life, he should have respected her for the sake of accepting to marry her.
Indeed, he could have refused but since his father then said he was sick, Robin did not want to make him sad and agreed.
"She's indeed the one who saved your life so what will you do now?" Daniel asked him.
Robin was so pained in his heart and also emotionally. As his hate increased towards Zayla, his remorse doubled for Sabrina but he was still lost in how to make it up to her.
"I can't face her, Dan, I'm too ashamed," Robin said honestly but Daniel thought to remind him,
"You promised to see her every morning and evening."
Robin regretted making that promise and forcing himself into her life when he knew that she did not like it.