Ishwari's pride-ego is going to be the biggest hurdle in Devakshi relationship. Her pride will first hurt her's n Dev's relation which she doesn't realise yet. She has expected Dev to behave the way she wants always. Dev had also not thought about himself till now n just did what Ishwari asked him to do as an emotionless robot. That's why she said Dev would never take a decision without my permission.
He pride has indeed become her ego for her to not realise how much pain Dev is going through all these years just to fulfil all the family responsibilities which had also been partially her ambitions of Dev to achieve the top goals of business world n be the best.
Her pride is not letting her see the obvious changes Dev has shown lately to his character or to say the real reason for the changes. His smiling all the time, laughing, wearing bright clothes. Everybody RR, the sisters, Tina all can notice the changes except for Ishwari. She does not understand her son at all which is why she is going to be hurt after knowing the reality.