My theory

Probably the reason why Bhabhi doesn’t get involved in the family’s matters anymore is because Chalu has changed every corner of her house after Bhabhi designed it. She completely renovated her apartment(reason given that apartment was previously designed as a studio and not residential, then renovated Ammis bedroom as per her liking(reason given they need a bed now), changed Ammi’s couch (reason given was termites infestation). So basically she changed every corner that was designed by pyaru bhabhi.