I wouldn't like it as well! Gauhar didn't like the fact that Asif bought her into the conversation even thought she wasn't part of it and it sends a wrong message.
Don't you think Asif is being called 'buttercup' by kushal because of miss Gauhar? She is the reason behind all this. And then if Asif is being made fun of he had to retaliate and he did it in the right way by saying the TRUTH. When Sangram called them love-birds why dis she behave in the same way. There was no point of her being a part of the convo or not.