Now, for Bani, she can confront when she needs to...she stood up to Sahil when he was about to give away his child...mind you it was to protect Rano. I think she has come a long ways in her character. Now she will protect J. Remember long time ago he was in her prayers along with her sisters too.
She does have a weakness when it comes to her sisters regardless of their character (read Pia). Recall when Pushkar brought Pia to the hospital with stomach pains, she refused to go help but she peered from outside and was going to talk to the doctor too. So, her weakness may lead to conflicts within her but something tells me J will be above P in her list now.