I know this maybe not what you want to hear but are you maried and shes getting it in the divorce or somthing? i had a friend do this once so heres my advice. is it paid for ? if not find some one to impound it most wrecker yards have an impound. then tell here it was repoed pay the storage fee for couple months get it out and be happy! if she see's you in it just tell her you bought another one. a little under handed yes and if you really love her and dont want to lie to her it really sucks. But you will get to keep your car at least.
my condoliances weve all been there before and i know how much it hurts. good luck