Nothing happened that night.
It's just that Aditya found out that she spent the night with Vikram and he is upset. Rightly so of course. But she did not tell him about it and TVS gave him her missing payal. Instead of her rushing to Aditya to explain, she chose to go to TVS to argue with him.
Unknowing to her but to TVS, Aditya was coming to TVS room and so TVS decided to show Sugni how much Adi trusts her and he was going to put the payal on her foot. She threw it away and it landed by Adi's feet. Aditya must have finally bought a clue and left. She tried and tried but Aditya did not give her a chance to explain. When he finally came home, she was waiting for him and he asked her yes or no if she spent the night with TVS. She replied yes and he walked away.
Sugni asked Adi to come to TVS to get the truth and when he went there, TVS spoke the truth: that she came dressed like a bride and he removed her mangal sutra, jewellry and they spent the night talking. That was all they did.
Now this part will be funny only if you are a TVS fan, When he was finished saying the truth, he asked Sugni : "Did I say the correct thing? Is that how I was supposed to say it?"🤣
My God Adi's face was to die for. Of course, this all depends whose fan you are.
Anyway, that's it really. Sugni trying to prove her innocence and TVS speaking the truth but in a manner that makes it sound as though it's not.