Nothing. You gave it to her, so it's legally hers now. Your only option is to sue to get it back.

ojay simpson her

Make her an offer she can't refuse

Nothing. You just paid a big stupid tax.

Your fault for not going to your bank to deposit the check into your account & replace your card. You deposited it in her account, and she has the money. All you can do is persuade her to do the honest thing & stick to her agreement to hand over the money to you.

Small claims court is your best option.

Nothing really you CAN do, unless you hsve something in writing signed by her saying it's yours. You put it there voluntarily. /she can say it was a gift to her. If you do have something in writing from her, you can sue her in small claims court.

Marry your ex, and then you can get your money back.

You can sue her but you would be wasting your time. You "gave" her the money. No written contract that it was a loan or that she will repay you. You gave her the money so stop complaining. Suing her would be throwing good money after bad.

Not much you can do you put it there. Don't ever let a woman manage your money