She seems pretty ambitious and career oriented, so maybe not starting a family yet is part of the plan and those career/work goals match up for them. Though I'm still not 100% sure there was a second breakup, the one time they did breakup seemed like she was the instigator there just based on his comments, but who knows. I do remember him commenting one time about a girlfriend being worried that he would be "too Hollywood".

I think it's pretty common knowledge around Austin they're together, at least it used to be. If he has to worry about her being faithful because there's no ring or vice versa then that's a whole 'nother issue.