I didn't watch the last two episodes but caught today's precap on insta and I don't think any of this is a ploy because:
1: Arylie won't play with the emotions of their family to such an extent
2. Jyoti is not important enough that such an extensive ruse is required to expose her. She is just a friend who is just tolerated in the house. Agreed she brought blood for Aryan but that's that. She is still a stranger and doesn't have a hold over the family. Even if Arylie would have simply told everyone her karnaame, she would have been exposed
So I don't Arylie would go to such an extent to expose her and we have actually been trolled by the makers