I think Pavani was trying to accuse Akshara for passing a message to Abhinay to nominate her (which he had allegedly told Pavani). When he denied saying that she got triggered and started mentioning other things, including him (allegedly) telling her Varun said something about her. It didn’t look like she went in the conversation to blame him but when he denied things her anger turned to him. We don’t know whether he really said those things to her, or she is making it all up. But I still find something untrustworthy in him as well. In the promo they show him pleading with her to come separately so they can sort things out. That doesn’t look like the sign of a person who was wrongly accused.