Am I the only one to find what she did very wrong?
And chiefly because, at 16, I had zero ability to control myself hormonally. So, yes, if this woman decided she wanted to have sex with me, I would have "hit that like the fist of an angry god" to quote the picture. I would have also fallen madly in (what I would have thought was) love.
And, at 16, probably like most men, I was also not ready for the emotional connection, nor, G-d forbid, a child.
To answer the question "why" : I think she did this because she wanted someone she could control, as she is out of control in her own life.