My final theory before the next episode ( most likely aisa kuch bhi nahi hoga and they are just randomly doing things):
1. Rishab has some past connection with Bhagya, like maybe childhood connection or something, where once they met again, he just wants to help her and be her shubchintak. He had no issues with her marrying the other guy, and he had no idea about the fake pati drama, until she got him into it.
2. He realized past few days that this drama is getting too real and he likes her and she also likes him. He thinks he is not good enough for her, or is trying to save her from having to confess to her family, so is doing acting with baby baby. The girl Mia is probably another poor actress from out of town, who had to visit in bad hotel due to lack of money.
3. As soon as Bhagya seems actually worried or sad, his whole plan will become flop again and he will go back to doing boss mam jaap. So if bhagya's ex comes back, that will definitely happen. Bhagya and we will keep being confused on his motives and changing personalities.
Matlab hame kuch nahi samaj aane wala, whatever his motives are, will be kept hidden for the time being and he will just keep switching personalities till they bring in his family and background.
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