I believe her that she is quite happy now. The problem will come when she is aging alone in the world and it will be too late to unmake the choices she's making now.
I don't agree with you on this. I think that as I get older, I am better able to cope with life on my own. When I was younger, my wife and I did everything together (both before and after the kids were born). Now that the kids are semi-adults, my wife and I have developed our own interests apart from each other. We still check in and do things together and sleep in the same bed, etc.; but we have our own lives separate from each other.
It is the lifetime of memories of partnering up and making a life together when we were younger that is so precious.
My wife is in Cancun with my son right now. That's fine with me. She wanted to go there and I didn't.
To everything there is a season... This lady missed her chance for a family and it's now too late. It's a sad story.