Tensions are running high inside the Bigg Boss 18 house as the reality show nears its finale. In the upcoming episode, Chaahat Pandey will be seen losing her cool at Karan Veer Mehra and breaking down after the latter's jibes about her 'secret boyfriend'.For those unversed, during the Weekend Ka Vaar episode, host Salman Khan exposed Chaahat's secret relationship of five years after her mother claimed that she was single and even questioned Avinash Mishra's character, calling him a 'womaniser'. While Chaahat vehemently denied the claims of having a boyfriend, Salman showed the housemates and audience a picture of the actress posing with a mushy 'anniversary' cake on the sets of one of her shows.In a new promo released by the makers on Monday, Chaahat can be seen telling the housemates that she has earned everything in life by working hard. Karan then taunted, "You and your friend had time to celebrate your anniversary in the midst of so much work?"This did not go down well with Chaahat, who then asked Karan to "get lost" and not interfere in her matters. "I don't want to open my mouth, otherwise I too have a lot of things to say," she shouted. She can also be seen breaking down and throwing things at Karan as he approached her later in the promo.During the Weekend Ka Vaar episode, Salman was seen hinting that Chaahat has a Gujarati boyfriend outside the house. Avinash, who was Chaahat's co-star in the shows Durga and Nath, also stated that her boyfriend would send gifts on the sets of their shows and everyone was aware of her relationship.Reports also went viral claiming Chaahat had introduced her boyfriend to her mother before entering Bigg Boss 18 house, however, her mother was against the relationship as the man was from a different caste.