First she was listening to Ragini accusations and she might have understood as soon as bracelet thing came that it was a fake drama
she kept quiet listening ragini part of story and all the words ragini was saying after her story
she called dida bcz she wanted shekar and dadi to come there it was part of her plan
bcz she wanted to prove infront of all that its raginis fake drama if she hadnt though she would prove sans innocent infront of MM people but ragini will call or go and cry infront of dadi and shekar and will tell sanskar molested her and swara defended him and how both swasan are playing cheap tricks with her
so swara wanted to prove everything infront of both families so later ragini cant play the victim drama
swara was listening to each and every ragini word so she can use it against her and she kept quiet listening how ragini was making each and every member included in her game and using them against sanskar
swara was silent bcz she was waiting for shekar and dadi to come so she can speak her points infront of both families but laksh didnt had much patience and tried to hit sanskar so swara didnt had option except defending him
she even pointed that when u cant trust us and keep on putting allegations on us y should we trust u and y should we always prove our innocence,i loved this point and was good slap to all of them not only its for ragya but MM and shekar,dadi too
she even said it can be a fake allegation but as she knows they wont trust her she said it can be a mis understanding
when she said i trusted on u too laksh,may be she meant when i can trust on u even after knowing ur mistakes like his fake kidnap of swara,using ragini bfr engagement to prove his family that he changed & fake engagement drama whn sanskar acted as mad then y cant i trust on sanskar who though did mistakes just like u but stood for me and fighted for me
so she just wanted to prove ragini fake drama infront of both families and her silence was a part of her plan