Thats a stretch, especially the last part. I don't think she cares about anybody's "image", if someone wanted to do that they could have clued her in way before when Tani use to get touchy feely and act like a brainless advocate for Armaan.
I feel like Ellie was being a good friend to Tanisha,caring for her because Tani clearly cares for Armaan a lot and we know how Armaan feels/treats her. If I was in the house, whether I'm a friend or not I would totally give the same advice, as a woman.
this just my opinion