The same thing Salman did with Rubina he is doing the same to Teja. Both the girls come up with logical points but he makes them look like illogical and confuse them more. Rubina after a few weeks gave up and soon Teja will do the same.
Teja's nature is to have fun with everyone but Karan initially was very much into the game. He said everyone to stay away or go against the OTT people that's why Teja didn't understand why he was discussing with them too. She even told him that she can't trust him when he is stuck between Shamita and her. She wanted to stay away from him too.
I wish Teja understood that what KK said to Shamita was quite demeaning. She is taking it like a joke while he was pretty serious about pleasing Shamita.