honestly for me both are ok though the first option seems more logical sanskaar had seen kavita in the mandir and he has got too many clues against her but i wont blame him for the second option as well he used to love her guyzz, i know how she has turned out to be but sanskaar wud never fall for her knowing that she is capabke of such plottings and since he does not know that and swara's doubt was proved right he may think he was wrong
weise i dont understand how sumi and dadi forgot that the footprints never matched with maasi's i hope swara asks abt it and then tells abt the footprints, chai cups, etc