omg i read the comments here as well and some of you are DROPPING HAAHHH, wait is the sml THAT ANNOYING? I'M SCARED…
For screen time i don't have justification. But the backstory which they have given to SML ,him acting like that is understandable as girl he likes is cohabiting with someone. Also I have seen dramas where SML's story as main plot that why it was easy for to watch him like that.
Isn't it considered unethical for a doctor to have a romantic relationship with a patient?
I don't think it is case of unethical. It is just that for patient might misunderstand care and compassion getting as romantic one. And for doctor there might be compromise on proper medical practice if there is deeper relationship.(BTW I have yet to see this drama)
I don't think he is entitled for revenge. Because its just marriage of convenience for both of them. We can't expect sincerity in those kind of marriages. He wants to be a good nephew and she want shares.