Pallavi is trying to save Mansi's wedding by not letting the fact go public that Amruta is the one pregnant. She did the best to clear her name and by the looks of it, it seems she knows that Amruta is pregnant. Raghav did what he thought was best by trying to give proof that would have cleared his and Pallavi's name as well as exposed Amruta and BWA but in doing so publicly infront of Rahul's parents, he would have and he did kill the prospects of Mansi getting married to the guy she fell in love with which is what Pallavi was trying to avoid. We do not expect Raghav to care about Mansi or her wedding and likewise we know Pallavi will do her best to save the wedding. So in my opinion, they both were totally in character. It was good to see Pallavi not take the blame of abortion and actually do something to prove her innocence in the matter. Now I just want everything to go fast forward because the real story will start when theu get married..
P.S - I wish the camera focus was on Raghav when he learnt that Pallavi infact is an orphan and not a Deshmukh...his reaction to that revelation was important