<prompt> Translate the following text to SwahiliThey had already arranged their infamous plot that he should marry this rich, but rather foolish old lady, induce her to make a will leaving her money to him, and then gain their ends by a very cleverly conceived crime.  <response>: Walikuwa tayari wamepanga njama yao mbaya - kwamba anapaswa kuoa mwanamke huyu tajiri, lakini badala ya kipumbavu mzee, kumshawishi kufanya mapenzi kuacha fedha zake kwake, na kisha kupata mwisho wao kwa uhalifu smartly sana kubuni. 