With regards to the portrait: The girl in it is fair, and has a triangular face with a long chin. So does Ipshita. I have a feeling that the girl in the portrait is Ipshita.
With regards to today's episode: I feel Shiv does love Gauri, but he refuses to acknowledge it. Because of the secret behind his sitting in the mandap. He does not want to acknowledge the Brahm and have it broken after Gauri finds out the truth. The reason I feel this way is because, Shiv was crying after they both went to bed in this episode and the background music talked about the Brahm breaking.
Just my opinion. What do you guys think?