Me thinks this is a misleading promo.
1. All this might be Madhu's dream. She might think this would be RK's reaction after learning about the baby. She won't tell him and have a miscarriage which RK might think of as DELIBERATE ATTEMPT TO KILL THE BABY.
2. RK might tell Madhu that he doesn't want baby. Madhu might have a miscarriage and would blame RK of killing the child.
Both the scenarios lead to separation.😛