I think she will leave the ring. Her doing so would symbolise this not being an empty threat (as Virat accused her of), but her leaving for good and bringing an end to the relationship. She also said she could not accept the ring as his wife at the time, so it may be a set up to return it post confession (if that ever happens!), but for her, at that time, to accept it as he meant to gift it. I suspect Virat will either see the ring before knowing about Sai's accident and continue down his current angry and destructive path remembering what he said to Said and considering this Sai ending things and not returning his love, etc. The alternative will he will find it after her accident and to start crying buckets as to what her state was when she left. Let's se how long they can stretch her leaving to next week. I suspect, per KD, Sai may have more abuse to endure from Virat and PK before leaving.