Indeed you hit the nail on the head! 16 is extremely young to be having children and making life long choices. I am sure your daughter is feeling like she is "missing out", and may be overcompensating at this stage.

She may even be craving love and acceptance from the male species, as it appears that the father of the child is settled down.

I think a good old fashioned one on one with mum, is what I would be doing, and spending as much time with her and giving her that love and acceptance and role modeling that only a mum can really offer.

Good luck Terri, and don't neglect your own health in this process.