This is not necessarily saying she did not want it. It's saying that she wants it less than he would like her to. So for example, if he wants to buy a sports car, and he wants her to also want to buy a sports car, she is less enthusiastic about it than he had hoped. So the difference is, if you say "She did not want" then on a scale of 0 - 100, where 0 is not wanting at all, and 100 is wanting dearly, then she is at 0. If you say it as it is originally stated, then all it is saying is that he would like her to be at some number (say... 80...) but she is only at 60. Make any sense?