First shock, then feeling sorry for kumud, regret at his decision, asking forgiveness, realizing his mistake is too big tio forgive and dejection, trying to gauge her reaction, finally acceptance that kumud is no longer his. So many expressions in a minute superb acting by GR.
I think Kumud got a bit inhibited to show her pain as her family was nearby
Both were good. Gautam showing his shock, pain, regret and dejection. Jennifer was just so good, you could see how much she was also hurt, and I believe regretting her decision as she would have realised that Gauti did come, the more so that she could not openly grieve.