Guys I have a theory about BS's behaviour, doesn't excuse him or his actions.
BS has always seen Appu fight, argue and shout whenever someone says anything to her, he doesn't realise the extent to which Appu is hurt now and she only fights on small silly things never when she is hurt. Plus he also doesn't know about DK and Appu's convo. So what I think is he is mistaking her silence and maturity as her guilt, like if she would have been innocent then she would have shouted and fought and not try to manao him as she was doing now.
This doesn't excuse his behavior, he should have at least had the courtesy to ask her politely that what happened from your pov, and not start accusing but I think this can be a reason for his behavior
What do you guys think?