There is no right or wrong here. Everyone has different needs, wishes and desires.
I, personally, could not go around having sex for fun. I would lose all respect for myself. I would do everything to teach my kids not to do that either. But did I wait until marriage to have sex the first time around or the second? No. But that was my choice. Would I encourage my kids to hold out until marriage? No. I don't really think that is realistic. It also might push them into marriage too soon and after my own failed marriage - that is not what I want for them.
I think I'm in a healthy relationship. I miss him when we are not together. I miss his companionship, our fun times and sex. But I would not say that sex tops the list. More like the icing on the cake. But icing without cake just gives me a tummy ache. And I think that's how sex without some kind of commitment might be. (I wouldn't know - I choose not to try).
I think I would be a bit worried about a 30 year old who wanted to wait. But I'm not in that relationship so I can't say for sure. I wouldn't want to make that kind of commitment without knowing that we were compatible. Yes - like a test drive - LOL! I think it is even less realistic for a someone who is NOT a virgin, one with kids to wait. But only you know what is really going on in your R and whether or not you could wait. I seriously hope you will not rush into marriage with this woman just so you can finally have sex with her. I'm not sure how long you've been divorced but I do know that it takes a long, long time to recover from a divorce and be ready for a new marriage.