My sister started dating a guy when she was 16 and he was 19. She was at school, he was working as a mechanic... he had saved money and was wanting to buy a house etc.
We thought he was mature and nice... and my sister was really mature for her age.
Well... she left school, got a job, and he moved in with her when she was 18... then they bought a house together...She is now 23 and he is almost 27, they broke up 2 weeks ago because he stayed at the maturity level of a 19 year old, and she has grown up, and wants more for her life.
The point I am trying to make is that there has to be a maturity there in both of them for anything to work... I will admit though, my sister wanted to wait until she was older, but ended up losing her virginity to him 4 months after they started dating.
Soul, I am glad your daughter is so mature and open with you and with how she wants her life to be... well done to both of you for having such a loving and honest relationship with each other