Naresh I think she will say yes for the rishta there is no reason she refuses it and since Archu is talking to her about it she might agree or ask for some time. One possibility is Purvi agreeing for engagement which gets broken on the day of ceremony due to her being adopted coming out or she asks for time then falls in love with Arjun but later when she comes to know about Ovi she would break Arjun heart agree for engagement.