The problem with that worry...

is that you have more rights to see your child when you have never been married then you do when you are.

In a divorce she can just say you abuse her/child, and you don't get to see your kids.
In a visiting rights legal battle the bar is set a little higher.

Yes, you have to pay child support either way, but it is assumed that she is supporting herself if you are not married. Makes a huge amount of difference in what schedules they use.