That's a really difficult one to answer China, but I'll have a go. No, it doesn't feel like you 'own' your children - not as you would own a car, or a TV, for example, but they are 'yours' because they are a part of you, and you would protect them with your life if necessary. There are times when you don't particularly like your children, but you never stop loving them. It's probably difficult to understand how one human being can love another so much, but it really is an indefinable and unconditional love which never diminishes. Having said that, if nature had denied me the ability to produce my own, I would have adopted, and I think that child would have been the most precious thing on earth to me.
I know a couple who, after a long haul, have just adopted a lovely little two year old boy. They don't bemoan the fact that they are unable to have children of their own - they are just so grateful that they have him - and never was a child so loved. To them, he is their own.