DevAkshi relation has grown much stronger and even if ishwari health is shown affected like she not following a proper diet then Dev would appoint a new doctor but he may not be able to control himself to stay away from sona only ishwari life can make Dev to be away sona that's y they brought suicide track. I don't think ishwari may not do suicide but unknowingly she may end up taking full bottle of medicines and since suffering from low blood pressure it effects her health immediately and the family may think that it's sona relation with Dev which caused ishwari the drastic step of ending her life and in this process Dev may get to know ishwari possessiveness and since his relation with sona has changed into a life and death matter for ishwari so Dev talks with sona and end his relation even though how much he tries he can't end his relation so they both make a commitment to stay with each other being apart. If Dev has made sona talk with ishwari she may get convinced in order to see Dev happiness but he was afraid again she may try to end her life that's thought made Dev in not allowing sona and himself to talk with ishwari and find her problem