Dear Navneet,
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You are in a situation which can be worse at any time, now whatever gift is with you, kept it and if you want to return, then it should be in written, otherwise you will be blamed, that gifts, jwellery, etc. are still in your custody, if any case is filed.
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Further, start keeping evidences such as video recording, call recording, messages, any documents, etc., for safer side.
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Try to sort out this matter amicably and try to avoid legal proceedings.