Ovi again will ask for purvi to leave. I hope that this is just an assumption as a further separation of purvi and arjun and pari would be a huge blow to PR. I personally does not think that archu's return alone will do it for PR. If she returns with a bad storyline, then it will be the same or worse.
Where does Onir truth come in and what effect will it have on him and purvi's marriage? If archu is going to try to reunite ovi and arjun under the condition that purvi has to leave again then PR will definitely become a joke. If this is the way archu is going to fix her family, that means that purvi was never really family. She is an outsider used by archu in her times of need when she was missing her children.
My POV