1. You may have to intelligently play your role now stating that you will handover all the items during first motion, but you hold back the jewels on the first motion and return the car alone.
During second motion, if she withdraws all other cases then you return the jewels and handover DD for the agreed amount.
If there are still some cases pending you may just give her a photocopy of the DD and handover original later on when everything is finalized.
2. If she is backtracking from mutual consent divorce then you can file a contested divorce by converting this case.
3. If she has agreed to withdraw all the cases then you can put pressure on her to take steps to withdraw everything before second motion, if it is not possible then you can take an adjournment of the second motion to accommodate her steps to withdraw all the cases by then.