Complex sentence: Johnny then tells Lalita he has to leave and return to London leaving both Lalita and Jaya upset while in secret, Lakhi and Johnny have been emailing whilst neither Balraj or Johnny has made contact with Jaya or Lalita.
Split into simpler sentences: Johnny then tells Lalita he has to leave and return to London, leaving both Lalita and Jaya upset. In secret, Lakhi and Johnny begin emailing whilst neither Balraj nor Johnny contacts Jaya or Lalita.