I don't think Chakor will be ready to listen him so soon, she shouldn't. Suraj doesn't talk much, he already explained his situation on Friday, he may apologize or say he regrets what he's done.
I don't think there is some hidden reason for Suraj's loyalty, he has been trained to obey them and that's it, just the effect of drugs and torture.
They shot one or two flashback scenes, maybe one of the will shed light on what happened to Suraj.
Tomorrow's incident will make Suraj question his behavior but will set Sukor relationship back for a couple of weeks. At the start they should show Suraj saving Chakor and she refusing his help and after this happens a couple of times, she starts to soften towards him.
Suraj must apologize to her many times. I hope his transform is convincing and better than that in baby track 2. Suraj taking poison to save Chakor's life was emotional but I thought she shouldn't have returned to him without him apologizing for breaking her heart and her trust.