I think Anokhi manegi he will make her understand he will do a proper wedding when the right time comes . To gain her faltered trust he has taken this step, i think anokhi will come round .
I think she should get convinced at least after couple of episodes. And what about the difference in their soch. Nikki forgot that she practically broke up with him and destroyed the red lehnga?
See If she had kept it she could have worn that for her wedding.