Purvi and Arjun

when you think about it, Purvi and Arjun are the only kids not related to the rest. If Purvi marries Arjun, then the rest will have to find other people and the show will have to expand its cast. If they don't marry, then Purvi will have to marry a new person as the other young males presently are all her adopted family. Sachin cannot be with Purvi as they were raised by the same 'mother' and in my opinion that would be like incest. so, either way, new peeps have to enter the show.