I agree with all of your points. That's why I can't fault any of the family members for their actions, even DK for suggesting that Netra stay with him. If it was Tanmayi in Netra's place, he would have said the same.
Only one at fault here is BS for his stupidity and believing Netra.
Yes thats correct he would have said same for anyone.
I guess she is khadus's assistant, he suggested to take in his room. why does he say to take her in another family member's room? If it is prachi or Amyey's friend he would say to go their rooms.
Knowing appu was angry for taking her to his room initially he should have said since leg is hurt lets no go updatirs but go to his/her room, That would have not put doubt in aapu's mind and then today he gonna question her.
so they have build up valid reason for her to leave