My wife cannot bear children and I desperately want another one. She won't foster, she won't adopt because of cost and we have been married 21 year.

Should have talked about this when you got together.

Now shut the fuck up and get over it.

On the face of it after 21 years something as changed, seems to be you, maybe a midlife crisis with a bit of death anxiety maybe?

Go with your gut. Do you love her enough to stay? Or do you want to find a younger women who wants babies?

Secret second family duh

Enter the Big Brothers program

I'd keep nagging.

Had you wanted to have more kids right from the beginning of your relationship? In other words, has this always been a problem or did something change?

Didn’t you know that when you married her? Or how long have you known?