Wow just wow after watching the episode I thought today no one can blame Sai for what happened with her or even feel anything but bad for her condition, but I was wrong!
Unlike what you've written here, I don't think Sai's reason for heartbreak today is that Virat washed dirty linen in public! Actually I don't think Sai would've given a damn even if Virat had washed this dirty linen in front of the entire Chavan family or neighborhood. Her actual reason for heartbreak was Virat's baseless accusations and relentless questioning of her character! And physically assaulting her friend. 
How is it a reality check for Sai cuz whatever she questioned about Virat and Pakhi in front of everyone is the truth! Those two lied through their teeth and acted like innocents being accused when they knew exactly what Sai was talking about. Virat knew Pakhi's relentless affection towards him, he even witnessed it recently outside his room when Pakhi shamelessly reminded him in front of his wife about their past!! So Sai as the deal or real wife has all the right to question these two about such absurd conversations these two keep having in private but refuse to accept in front of others.
Even if Pakhi didn't know about Sai and Virat's relationship status (I know Sai keeps giving out their personal info in public) she still would've sent Ajinkya to their room cuz she is a vile ruthless character. There's no justifying that woman's actions cuz even if Virat and Sai were madly in love, Pakhi as the relentless ex would kept on sabotaging their relationship.
I definitely hope Sai doesn't change in this regard and keep on divulging their private info in front of the family cuz otherwise the so called bff and Virat will keep on having midnight conversations and the family will forever remain in the dark. Atleast Mansi bua deserve the truth!
Honestly what should be discussed is Virat's very serious anger issues and how he should work on it. First kicking his wife out of home at midnight and now assaulting a college kid, as a police officer he should've known better. Heck even criminals get time to justify themselves but Virat right away became the executioner.