To be honest, I would be moving pretty slowly with you, unless you lost 2 of your previous wives to death. You are a poor candidate for a long term relationship, based on your marital history. This woman's child has already lost one family, and if this woman is a good mother, she won't be eager to drag her kid through yet another divorce, so considering all that, I probably wouldn't let you near my kids for at least a year, and very possibly more, dependng on how that year pans out.
And yes, you probably ARE a booty call, and she probably likes you, too. That doesn't mean she shouldn't want sexual exclusivity, and this isn't a game. YOU are the one who sounds needy and clingy, and like you are looking for some drama.
Relax... I'll need some information first. Just the basic facts - can you show me where it hurts?