summary please

i haven't watched this show in a long time, since the beginning of september. the last time i saw it, tanya's and karan's relationship was shaky and bhoomi found out that nandini was her real mother. Also, trupti and tanya were trying to prove that tulsi is juhi. Billi betrayed archita when she wanted him to tell her husband that billi was just her friend. can anyone please give me a summary of what happened since then with all the characters?