Boobpeep, your posts are critical and extremely unkind and I can quite see why you would want to estrange. Fortunately many on here, including the poster have feelings, no one doubts that once you have raised your children they should fly the nest and make a life of their own, however we need contact with each other, that doesn't mean control of them as you interpret it. Pink peony misses her child and you have no empathy in you it seems. Some children do grow up like you and unfortunately for many of us it takes time to recognise. Took me years but I didn't bother her as you say, I let her go but the pain was awful. I haven't that same pain anymore. It takes time for the rose tinted spectacles to come off.
Your heart will mend round that hole Pink, who knows what the future might bring, concentrate on those you do have, they want you, lots haven't anyone, you have not closed doors, leave them open knowing she is free to return if she feels ready.