When they were in the car and background song which was playing had a line "Na tu galat, na main sahi" It is perfect description of this situation. Na Anu galat hai na hi Vanraj sahi, isliye jo ho raha hai woh ekdum sahi hai. Vanraj while arguing with Anu again said that what he did is galti, he has not realised what he has done is not galti its cheating and Anu rightly said maine aisi galti ki hoti toh aap maaf kar paati and he didn't have answer and told her she is ziddi, shows that he cannot tolerate Anu with someone but his cheating should be forgiven. Vanraj has a long way to go, till he realises what wrong he has done, he is not even close in realising it.
When Baa didn't like Anu, taane khatam nahi hote the unke, she was one of the reason for a barrier between Anu and Vanraj, bcoz they way she belittled Anu for each and every action of hers and the way she boosted the male ego fo Vanraj. But Kavya ke saamne kyun nahi bol paati. She giving chance to Kavya to make her place in their life, shows she has accepted that Vanraj and Kavya will live with them.
I am also not happy with Samar saying that Kavya humare saath aake rahegi, I had thought that he is the one who will never leave Anu, but not even once he has said or thought of leaving the house with Anu. He was her biggest moral support and now when she will need this support the most, he is going to stay with Vanraj. Completely disappointed in Samar, other 2 toh I never expected anything. Also Baa asking Kavya to not them stop from meeting Anu was stupid its like giving her a power over them already.
Kavya told Nandini today ki usse apni kismat pe bharosa nahi hai, but the fact of the matter is ki usse Vanraj pe bharosa nahi hai and she wants to marry a man whom she doesn't trust.
Bapuji told Baa ki acha waqt dekh liya ab bura waqt bhi dekh lenge, sahi kaha, jab tak Anu thi unka acha waqt chal raha tha lekin kisine kadr nahi ki uski, ab Anu jayegi and Kavya aayegi and unka bura waqt shuru hoga.
Once Kavya comes, everyone is going to get their Karma back for whatever they did to Anu, thats why Baapuji said, bura waqt bhi dekh lenge. Each and every member of the house (except for Samar)is in a way responsible for this happening. Baa for always taunting Anu and like you said in front of Vanraj, Baa never used to accept her doings and used to put blame on Anu. Bapuji for silently seeing all this and not saying anything. Pakhi and Toshu for giving importance to Kavya over Anu i.e. Pakhi taking Kavya as her mother to school competition and Toshu replacing Anu with Kavya when Kinjal's family came for the first time, making Vanraj feel that Kavy is perfect choice for him and Anu is not right for him. Kavya herself will also get her karma back.
The argument that Anupamaa and Vanraj had was like a husband and wife has, which they never had, while there were pati patni. Though it was in a way good, since it lightened the emotional episode a bit.
Bas ab kal ke episode main divorce ho jaye, ab wait nahi ho raha, like you said. So that Monday se it can be a new beginning of ANUPAMAA.