Hi guys,
I feel Jai said this to Bani because he knew in no other way she was going to listen to him. If he had told her he cared for her and wouldn't let her do this, I am sure her reply would have been you have no right to tell me what to do and what not to do. Hey may not have any right on her but he certainly has a right on his child and that's why I think he made the child as an excuse to get her out of there. When a man was trying to tease her, he did not try to save her just because she was carrying his child, he saved her because he loves her.
And yes I agree with Anu and MT, you have to watch the video to completely understand what was hidden behind those words.