Because Zain is self obsessed, he loves his pics!
Avni is NOT going to be marrying Vidyut I can tell you this for a fact and her scenes with Vidyut play out later on. Their consummation scene is not going to be interrupted and does not happen because of that OLV with Vidyut, that OLV comes later. The scenes that lead up to the consummation are from the OLVs from the police station and the bytes posted where they renew their vows.