I don't think Tejran are being fake, first of all.
However, Ritesh calling them as fake is his own opinion, or Rakhi's, and was completely justified within the format of the show. It might have rankled them, but that is also part of the game. People are not going to tell you exactly what you want to hear.
But, Karan's reaction was simply out of line when he brought in personal details about Rakhi's and Ritesh's marriage. He was hitting below the belt in a way that made him seem like the lesser person despite the fact he is supposedly a very respected TV personality etc. It also has given Rakhi license to bring out his own considerable dirty linen... 😡
In the end, Teja will not stand for that sh*t. She wanted to keep her distance immediately when she realized that Bigg Boss was trying to create a triangle between them and Shamita ☢️