When Robinson 's sister , Michelle , began dating her law firm colleague , Barack Obama , who played basketball recreationally , she asked her brother to play with Obama and give her a character assessment .
Sister would know whether sister could become serious with Robinson .
When Robinson 's sister , Michelle , began dating her law firm colleague , Barack Obama , who played basketball recreationally , she asked her brother to play with Obama and give her a character assessment so that she would know whether she could become serious with him .