Thanks all for your comments. In normal situations, I think parents should put in mind to have their own lives independent of their children to allow their children to grow and have their own lives, and make this message to be heard clear and loud. This might include secure some monies, take care of their health, have good relations with others and be active in the community where they are living in. This doesn't mean not to call and check on them every once a while.

I think children when they see their parents happy, healthy, and enjoying life on their own terms, they won't feel guilty about being apart. On the contrary, this might attract the children to be more around their parents. But when parents make the message heard to be such that we are alone, lonely, unhealthy, or broke and thus we need you around us, this will push children away, at least psychologically.