“Have you never heard of “Kim Li”?”
kim li is only an issue if she had the money (or asset) in the first place. since al pi din, as the husband, he owns (muchzak) the money and assets before the beis din trial began, this point wouldnt be relevant. so she couldnt demand secular law trump Torah law, and hence he be made to remit 50% of his money to her. (besides, is there even a minority opinion that holds that secular law trumps Torah law in a monetary matter than halacha deals with?)