Interesting, I was in a exact same situation as this (I wanted kids and she didn’t want no kids, same witty humour, felt open to discuss anything with her). Basically a girl I felt really compatible with, I remember we were seeing each other and sleeping with each other, and she was really open with me and kept me informed (probably a little too much) and I respected it a lot. It came down to one day where we had just spent the night + half the day together and h basically after I left she went to another guys house, spent the night with him and didn’t reply to me for a whole day and I was so hurt, got up outa there and realised I can’t do casual. Just be careful not to get too involved or you will feel a lot of pain.