There's an allegation that his wife's attorney (who had, unknown to the wife, served as Rubin's attorney in his previous divorce) conspired with Rubin to fraudu

There's an allegation that his wife's attorney (who had, unknown to the wife, served as Rubin's attorney in his previous divorce) conspired with Rubin to fraudulently induce his wife to sign a ridiculously unfair ("unconscionable") pre-nup, which if proven will probably have bad consequences for the attorney and get the pre-nup thrown out.