What dawn said is so on point. 40 year olds with kids arenít usually looking for a very casual no strings attached kind of thing. And if they are itís a short lived thing they are getting out of their system, it ultimately, they arenít looking to live their life that way. So, like wild girl, you got her for a summer, where she was all about the fun, but in the end, she wanted a LTR, even if she isnít faithful in it.
You meet who you meet, yes. But like the others mentioned, maybe finding new venues to meet what you want to attract in. Meetups, different groups, different hobbies. Youíll meet different people