If she and William just "fell in love" and want to go and bring up their family in the countryside they should blooming well abdicate!
She willingly signed up to be the future Queen the day she married William.
What rot. For a start, you don't know how willing she was to be a queen by the time she'd seen the inside of the gilded cage. She didn't look overjoyed (and still doesn't) about being photographed while not at public functions. I would say that given her dislike of publicity, she quite possibly wouldn't have chosen for William to have this role - and we can't have it both ways, criticising her for being attention-seeking on one hand while sneering that she doesn't show up often enough to have her picture taken on the other.
She signed up to be a loving wife and mother, to support her husband in his role, under his guidance, and to make a difference where she could. In that order. And that is what she's doing, with her own prioritising system rather than anyone else's. No one, in this day and age, is obliged to wear their husband's identity when they marry. The reason we have moved on from that is because it was wrong and oppressive. It's disappointing to see mumsnet advocating that another woman have parenting choices etc forced upon her.
The idea that she could merrily suggest to William that they abdicate before they ride off into the sunset together is ludicrous. She doesn't have such an option, but that shouldn't mean she shouldn't have other options that are open to all women; when to be at home with her children and whether to work. Again, she didn't sign a contract with the British public as her employer and she is not at liberty to return her 'wages' to the British people, therefore it would be unethical to force her to work for us. I disagree with those who are suggesting that marrying her husband was tantamount to signing such a contract, and I also disagree, given the ages of her children, that she would now be in breach of such a contract if she had.
At the moment, Kate seemed moderately willing to do her best in her public role but far more interested in her children. I don't feel that is unacceptable and I wouldn't suggest that she shouldn't have married her husband if she wasn't prepared to work her ass off. She married him because she loved him and she's amiable about the life they're obliged to lead. To my mind, that's quite enough for a couple who are not even next in line to the throne.
Diana certainly didn't work once she was in Kate's position. No other female younger royal has comparable media attention. It would have been difficult to do a job that allowed her to move to Wales etc at the drop of a hat.