Here are my two cents regarding his mother. What we have seen, is she believes that her husband and younger son passed away due to Raghav. As per her, he is the reason she lost her family, and as a result, to protect her daughter, Kirti, she has abandoned Raghav. But deep down, she cares and loves Raghav as much as she did when he was younger. This is evident by the fact that she agreed to come to his house till she gets better, keeps a tab on all his deeds. And the condition that she had put for coming to his house clearly shows she wants him to be a better person. She is angry with him for his mistake. Don't all of our mothers do that? When we make mistake, they get angry and warn the other sibling not to make the same mistake? I think once these knots are undone, we'll see an amazing bond between a mum and her son.
Regarding Pallavi, I think she is going to be a strict but a very loving MIL, since she already knows her through Kirti.