Arranged marriages are so scary nowadays, even a 6 month engagement is not enough to guess the nature of both the bride and groom, there might be mediators who can vouch for both families but even they cannot guarantee the nature of the son/daughter with whom they do not have much interactions like their parents. Jahan aunty has completely misjudged Gautam here whose good looks defy his bad character. How can he consider his work and income to be more valuable than a good wife.
You only get to know a person's nature once you start living with them, hence even knowing a person for years cannot guarantee a successful relationship. Even childhood lovers sometimes break up after marriage.
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Doesn't look like any major drama happens during the engagement. At least from pictures, don't see Ishika or Babita in that engagement ceremony sequence. Although with frequent fights between Aaji and Babita, Gautam should be deeply uncomfortable regarding the alliance and even Aaji (seeing how sharp they normally show her) should be shown getting worried from the negative signals shown by him.
Yes, will hate Virat if he thinks along those lines. But looks like he isn't angry from that engagement pic of Aaji, Amu and him. 
After that may be dildar and Bhavani will agree and junior pandit to hai hi
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