Honestly speaking, I would tell everyone the truth as it's not Aakash's fault but SP's and he has to take responsibility for it. However, I would not tolerate his disrespectful behaviour and would have given him a piece of my mind. Most of all, I would have scolded Gayathri and questioned her change of affections just. That I will not tolerate as she is insulting a son whom she had love so long but changed just because he is not hers and the moment she had said the dirty blood part, I'd just give her a piece of my mind, pack up our bags, leave SM and ensure that we are successful and happy so that Gayathri knows what she lost.
I know it's really extreme but I really cant tolerate this level of insult. why be there when your presence is clearly not appreciated.