In Episode III when Padme` tells Anakin she is pregnant he says "Thats ..... wonderful" Do you see the hesitation in his voice? Then later in the movie Yoda says "Jealosy and the fear of loss are the pathway to the Dark side". I think that Anakin was jealous of the babys thinking that he would not have as much time with Padme` now that she would have to take care of the babys. And you know how passionate Anakin loves Padme` and wants her all to himself Jedi these days!!!!!!!!!!!!!!!!!!!!!!!!!!!