So in the post leap photos, Vividha has sindoor in her forehead. Assuming that Sujata stops the wedding and hopefully Vividha does NOT get married to Ravish, perhaps she's just using the sindoor like Sujata did re: Ramakant...to maintain an air of respectability b/c she's going to have a child and because she already considers herself married to Atharv (remember that, Vividha?!).
And perhaps Atharv sees that sindoor and assumes she went ahead and married Ravish, which is why he stays away for so long.