Toshu was willing to move into Dave mansion even before marrying Kinjal as he fancied a lavish life without much effort.
Easy comforts is what paritosh wants. He is a permanent fixture in Shah house after he joined the idiot gang. Till then he was visiting them occasionally.
Kinjal wants to be a daughter of the Shahs. Like baapuji says a father in law becoming a father maybe easy for Vanraj too but the willingness should be there on the part of the daughter in law to accept the the care and rights they will take as a result. Kavya wants rights but no duties.
Kinjal wants to perform duties. She models the care giving on Anupama. But she refuses to being dominated by Paritosh as he is pushed to say and do things at the instigation of Rakhee Dave. The guy can be easily manipulated for asserting his patriarchal mindset.