Unwanted pregnancy raises the question of just how serious people are about the consequences of what they do. The pill ,condoms and other forms of contraceptive should have made unwanted pregnancies a thing of the past and yet still people take that gamble. Abortion is a choice, but I personally can't say what would be "best" for all concerned and at 26 I would think that someone should be mature enough to deal with the situation they themselves created. Either way she will have to be capable of living with the choice she makes, the guilt that a lot of women feel at having terminated a life can exact a heavy toll but an unwanted child brings it's own problems.
I have been in the situation where my partner decided abortion was the best option but she has had problems living with the choice she made.
Tough call either way but it's something only she and the guy can decide.