Only Bani was wrong and only Bani got physical. Lopa neither said anything wrong nor did she get physical without a reason.
Bani pushed her several times, locked her in a bear hug and threatened to throw thermos on Lopa, when Lopa tried to clarify her point.
Lopa pushed only once in retaliation after Bani's several pushes and pushed her arm onto Bani's neck to come out of Bani's grip and that's actually when Bani released her.
I've always thought Bani is over-sensitive and overreacts sometimes but today I realised she purposely twisted the situation to her favour.