Yea I didn't like Mai's advice too much either but I don't think she meant it in the ITV FL way...Mai herself doesn't do it...I think to her it meant like always fight for your rights and don't let others take your husband away which is fine but here the husband is the idiot...
Appu needs to tell the whole truth including Netra's obsession with BS to one of the elders so that they can give her the full proper advice instead of bits and pieces based off Appu's random questions.