Khushi has already started to think how Aarav and Arnav can be so similar in personalities and the way they are behaving towards other people. Arnav will also confess to Khushi that he used to date Sheetal when they were in college - this little piece of information is going to be the one that will make Khushi doubt if Aarav is Arnav's son. Khushi will then start to see many more similarities between them and that will lead her to do a DNA test to verify her suspicions. We will all know that since this is a TV drama the test will confirm that Arnav is the dad (in the future we will find out that someone swapped the tests) and that Khushi will be in shock. Even though Khushi has confirmation she would still want the truth from Sheetal's mouth so she will confront Sheetal face to face and as her. When Sheetal will not confirm or deny - Khushi will show her the DNA test and demand her to say why Arnav was never told. Khushi will then bring the whole family together and force Sheetal to tell them that Aarav is Arnav's son and he never knew. Everyone will be shocked as expected but Arnav will be the one who will be most upset - that he has a son and he was never told. But Arnav being Arnav will not accept Aarav that easily because the boy may come between him and his love Khushi - even Sheetal will expect that this will make Khushi leave Arnav.
What Arnav seems to have forgotten and what Sheetal doesn't know - is that Khushi will never ever reject an innocent child nor will she leave Arnav. Khushi knows that Arnav cannot live without her and also that Aarav at the same time deserves to spend some time with his father. This is when Khushi will ask Sheetal and Aarav to move into the Raizada mansion so that the father and the son can bond - however it will be Khushi who will end up spending more and more time with Aarav. Arnav will start getting jealous of his own son and will demand Khushi to also spend some time with him, but Khushi will find a way to make Arnav spend time with Aarav without her. Slowly Arnav will start loving and accepting Aarav and at the same time Aarav will also accept Khushi as his stepmother. In the meantime we will see Sheetal trying her best to make Arnav and Khushi divorce - she might use the Aarav and say that a child should have both of his parents together, or do little things to ruin whenever Arnav and Khushi wants to spend time together by making Aarav interrupt them, or since Sheetal will work at AR Designs she will make sure that Khushi's phone calls never goes to Arnav etc.
This will go on for a few weeks until the new male entry for Anjali will enter their lives - he might be a doctor, business man (as long as he is not a lawyer). I want the new man to be filthy rich otherwise Anjali will never get over the doubt if this man also only wants her for her money and not for herself. This new man could have worked with Sheetal before and knows how cunning she can be and that she will be willing to use people to gain what she wants. The new man will then slowly start to work together with Khushi and NK to try and trap Sheetal but they will not be successful until Anjali comes on board. Anjali will also start to notice the ruthlessness in Sheetal and will have her own doubts about her and Aarav - she will than join forces with Khushi, NK and the new man. This track will not only make Anjali the one to expose Arnav to the truth (the same way Arnav did about Shyam) but also to make the new man and Anjali fall in love - although the new man will love Anjali almost from the beginning Anjali will be apprehensive and will keep her distance and be cold towards him.
After Sheetal will be exposed - we will all find out that she was sent by someone who is related to Arnav and wants revenge etc. Arnav will be furious will Sheetal but also upset that Aarav is not his son after all - Khushi will be equally sad knowing that Aarav belongs to someone else. After Sheetal and Aarav has left the house Arnav will see that Khushi loved the boy and that she is misses having him around all day long - this is when Arnav will decide that they are ready to have a child of their own - both of them loved being Aarav's parents. Meanwhile Khushi and NK will notice that the new man and Anjali loves one another but aren't doing anything about because Anjali is afraid to give love another chance. They will come up with various ways to make them spend more and more time together alone and will ultimately be able to make Anjali realise that the new man is not another Shyam. That this man loves her for who she is and not her money -that he will keep her happy for the rest of her live.
After this we might see Shyam coming back into their lives to ruin Arnav and Khushi's happiness but also to make sure Anjali never marries again or we might see Khushi's parents' death track or some othertracks.
This whole Sheetal and Aarav track is there to show us that Khushi will never leave Arnav - yes in the past she was willing to commit suicide for his happiness but now she knows that she is his happiness. If she left him - he will slowly die inside and will become the ruthless and cold ASR again. Arnav, Sheetal, the unknown enemy and the India Forum members are all expecting Khushi to misunderstand Arnav and that she will leave him behind so that he can be with Sheetal and Aarav. However this is the big twist the CVs have been going on and on about - that something unexpected will happen and that is that Khushi will not separate herself from Arnav. In every single show the female lead would leave the hero and the villain will be successful in creating a rift between them.
However our show is unique and it will stay unique when we all will see how Khushi will decide to stay with Arnav and how the villain will never be able to separate them. Arnav and Khushi's love is beyond this world so it cannot be separated either by death, themselves or fellow human-beings. Last but not least let me finish by saying:
"If no one was able to separate Arnav and Khushi while they hated each other than no one will be able to separate them when they love each other."