This is so not fair to her..the poor thing thinks that karen doesnt know anything, and hoping that bhoomi will call her mom one day..and karen on the other hand is with tanya...that is not fair!!! i think he should tell nandani and if not, then he should leave nandani, cuz that is better then lying to her, atleast she wont be as hurt when she finds out with mr. karen is doing!!
Mallika