I think imlie should experience such situations like today. She should understand she cannot give away her husband to another person. She needs to understand it's not going be easy to see her husband with another lady, whether it's doing pooja or casual hug.She have to understand she cannot be a suhagan only with sindoor or mangalsutra, she needs her husband and a relationship .
I think imlie was content and accepted the situation when Adi was in denial. She thought she will the only one who invest in their relationship. She had seen the same with meethi. She always seen this aadhi adhoori relationship, meethi- dev or satyakam - meethi. Now she is confused because Aditya is changed and he is very much interested to be with her and she doesn't know what to do.
She also need to understand malini likes her and care for her because of tripathi family.They love her so she also started.she do care for imlie.I don't think she doesn't truly consider imlie as her sister. Because I think she will never behave such a rude way. if any other tripathi ladies came to her room without knocking .