Dear, I don't know if saying this would be right at the moment seeing you are angry. But every relationship goes through such phases. Not everyone is as mature and understanding in relationships like Sanskar, I think we should not forget that when Ragini accused him of misbehaving with her earlier Swara point blank refused to believe it. she knew he was not capable of doing such a deed.
But here the situation is different.
Sanskar has a certain history that proves he can do such a thing. I mean to say when they were trapped in to marrying by Ragini he kidnapped Lakshya, right now Ragini was trying to defame Swara with no options of escape, it is natural that Swara's mind would waver here.
And also she did a good thing by approaching him directly and presenting her doubts.
I'm not saying Swara was right in her place to hurt Sanskar, I'm just saying that just this act of hers doesn't prove whether she deserves Sanskar or not.
I don't know if I offended you with this reply, if I did, please forgive me. But this is my honest thought. She's a young girl, she can make mistakes.