Reason: The makers wont reveal this truth so easily & so soon...the precap is misleading.
Sanskar wants Ragini with him. Let us assume that Sanskar overhears Swarya conversation, he might fear losing Ragini & therefore proposes Ragya marriage. He is mentally ill & doesnt understand the ibnstitution of marriage...he just wants Ragini with him, no matter what!!!
About that photograph...taking Sanskar as insane...he might have stolen Ragini's pic from her house during all that drama & must have hidden it there without anyone knowing about it. So i assume that pic to be of Ragini.
#Sanskar_Ragini_forever
#SanGini