My two cents at Sana's drama:
She could not handle Mahira getting attention of Sid
She wanted to make Mahira realise how does it feel when other person gets close to one, you are possessive about whom. Her rant about Paras that i love you and i always say it openly, none else has the guts to do that, i want only his attention.
She wanted to make sure Mahira gets impacted.
But it backfired, Mahira dint and Sid did.
Sid got impacted when paras kissed sana
He got impacted when she said mein yaha sbko satisfy krne vali lagti hoon
When she said i love u to paras(even bagga's reaction was)
When she said i want only his attention
When she said now vishal is everything to me
When she had vikas on her lap
She did realise it later, but Sidharth who got hurt by just a single comment that today someone is looking a villain, what else do u expecr from him after getting so much infront of his eyes. That humiliation he cudnt take, everyone in the house clearly knows how badly he gets impacted by her and how possessive he is about her, when infront of everyone she said so much for Paras and sid looked like a fool there, then definitely he would react.
He still hugged her, just to make her feel okay. He ws hurt, which was evident by his dialogues "what paras did to u, u did to me, u made me an option; i am sidharth, not chabra; tu to uske mooh lagegi; sana went overboard.
It was not even dumb act, it was stupid that she dint even realize in the flow what she was losing, where she gained nothing.
Lets see how Sid goes on now.