I dont think we need to worry about Ishra. Even when Raman was not in love, and took Adi's side, he did not cheat on Ishita. Now he loves Ishita and he know he has a huge problem child in Adi. So he will always be with Ishita, also coz he knows she will only work for the larger good.
i just hope once Shagun gets well, Raman will move her and Adi in an apartment and give her money to spend. It is just the length of stay that will be annoying, esp since there r no guest rooms in the house.