What is this woman's background story? Is she poly, does she have other partners? Is she mono? My first concern is this woman is looking for a primary partner...for life as in the role of a wife. I could be totally wrong, but I would be wary of the possibility that she is a cowgirl. I would move very slow...they'll be asking for co-habitation soon if they are already in the baby planning stage.
Not to be pessimistic...but look after yourself and keep the pace very very slow. I'd be really surprised if this woman is into sharing the father of her desired children.
But that is just me...and I'm a little one sided