if she consciously liked it then it's not really rape i don't think
Something makes me think that she liked the fact that she got raped, and not during the act of rape itself, as in, "rape happens for a reason and I'm thankful for God to have bestowed this wonderful gift of life upon me" or some stuff like that.
But yeah, she really,
really shouldn't keep the baby. She wouldn't be able to support it well (if at all) at her age, and it'd most likely ruin her life. Sure, she could put it up for adoption, but a foster environment or something similar. isn't really the best kind of place for kids to grow up. A foster home is to a 25-kid classroom in school, as a smaller home with maybe 1 or 2 siblings is to a much smaller class of 10-16 students; more "sensei-student" interaction.
And, well, the pain of childbirth and the possibility of dying is also another important thing to consider.