How old is this pregnant g/f now, and how old was she when she became pregnant with this 1-1/2 y.o.? Or is the baby closer to 2 yrs. old? It might help to know what their actual ages were at the time. If she was 16 or 17, and the sex was consensual, I don't see her as a victim. JMO. Girls that age are aware of the chances of getting pregnant, and schools give away contraceptives all the time. If she is living with him now and pregnant with another child, I'm sure she doesn't feel like a victim either. When they willingly agree to have sex and have the misfortune to get pregnant, that doesn't change their status, as far as I'm concerned. Legally, maybe but NOT morally. Too many young girls are more than eager to jump in the sack (or the back seat) with guys and then cry rape later. It's crazy how many guys have been convicted and labeled as sex offenders who did nothing more than believe some girl who told them they were at least 18 or older. IMO, 16 or 17 is plenty old enough to know the consequences of having sex. They teach sex education in schools at a very young age these days.
I respect others' opinions as well, and don't mean to offend anyone, this is MOO.