Maya's fear towards Ashwin is 100% genuine... she is fighting her fear. After she announced about Ashwin and accepting him, she thought of outcomes like having to face Ashwin everyday in her life is what made her a bit weak and scared her.
With Arjun, Maya gets the strenght to face Ashwin. Remember in the initial episodes how Maya used to get Scarred of Ashwin just by his footsteps? But then after Arjun had entered her life and had saved her once from Ashwin, she gained strength to face Ashwin in the mall just by seeing Arjun from a distance... but then even after that incident there did come few other scenes of Maya again becoming weak and feared Ashwin.The thing is Ashwin is the guy who had tortured her in her childhood so its very difficult to forget all that and face that abusive person. Its like an on and off thing... sometimes you can bravely face that person, sometimes you feel scared and vulnerable when the brain thinks and remembers negative stuff.Regarding Arjun announcing marriage, it was not Maya's plan. How sure was Maya that Arjun will do exactly what she wanted? And that too marriage announcement within 7 days? How much ever one manipulates the thing is one can never penetrate in someone's mind and make them do things exactly the same way as the manipulator wants.This marriage is a sudden decision taken by Arjun, it was never in Maya's mind.
And yes that scene and dialogues of Maya to Saanjh was not that bad. I felt Saanjh deserved that. Lol pls don't misunderstand me but off lately Saanjh has been going on about how she is giving her khushiyaan and kismet to Maya. Even in today's episode she said to Maya infront of all "tumhe Meri Saari Khushiyaan miljaye" lol what does Saanjh mean Seriously? Arjun is her best friend so she owns him and has him in her kismet? This kind of thought is not a right one and its like she is self pitying herself with a fake sense of fake sacrifice. Its good Maya gave her a dose of her own medicine. Because no normal girl in Maya's place would tolerate this kind of shit aur yeh to phir bhi Maya hai. LOL