When I was dating it was never about the number of kids a woman had but rather the number of problems she had with them!
I once dated a woman whose kids yelled at her and disrespected her in countless ways. She did not believe in spanking them and encouraged them to "express" themselves. Since I knew I would never put up with that crap it was clear that relationship would not last long. If a child will yell and throw a stuffed animal at her mother in anger you can imagine what she might attempt to do with someone who is not related to her.
There was another woman I dated whose ex-husband was constantly fighting with her over issues dealing with the kids. He never wanted to take them for weekends because he did not want her to be out having fun. It was his way of controlling her and thus controlling what we could do. From time to time her mother would watch the children for a weekend but we were never able to go away on a 7 day vacation.
Eventually the older one gets they are more likely to meet people whose children have left the nest. However some of them are like a bad penny, they keep turning up asking for money and pulling their parents into their drama. As I stated it really comes down to how the parent handles their children and not the fact that they have them.
In the end I married a woman who like myself never had children. It just worked out that way. (Although she treats her two cats like they are children!) LOL!