I disagree with your views on a Oedipus relationship. This soap is focussed on the mother-son relationship wherein Ishwari considers her son above all and is very possessive and protective about him. He is still a kid for her, so she expects him to discuss every detail with her. But Dev has grown up and is now shown as moving into the next phase of his life - choosing his better half. There hav been several scenes shown in this serial, wherein Ishwari's daughters hav playfully accused her about being biased towards Dev. It is true. Though Ishwari defends herself commenting that she loves all her kids alike, there is no doubt that her expectations from Dev are very different.
Dev is aware of this and hence chooses to wait to reveal all. He also knows that his mother is capable of figuring out all this herself, which would save him the trouble. 😃
It's a beautiful relationship. Let's leave it at that. 😃
-Rekha