I genuinely believe that Imlie has a severe saviour complex, it's not a bad thing per se but can be annoying after a point. I think she feels the inherent need to save everyone around her, be it the Ts (from their million problems), be it the Rathores (by getting married to ASR to save Nirmala and Arpi), be it Aryan (Arvind's case) and now on to Arpi (by raising the topic of her re-marriage).
Maybe her upbringing moulded her this way; there was hardly anyone to protect and save her and Meethi from the many obstacles they faced in Pagdandiya, so Imlie took it upon herself to save themselves. It was a bold choice, she's still hardly 20 years and still feels like the burden of the world is on her shoulders. I know she can do anything but I hope Aryan makes her realise that it's okay to let things happen and not feel the need to do anything about something, that it's okay to enjoy your life for yourself and not feel responsible for everything and everyone.
Strictly my opinion, what do you guys think?
-Sanya