[The woman choose to spread open her legs.
Choice 1

She choose to have sex without using contraceptives.
Choice 2]

What about rape victims ?

They did not choose to, as you so crudely put it, 'spread open their legs.
They did not choose to have sex without contraception, and I doubt very much if the perpetrator would consider the consequences.

Would you seriously condemn them to nine months of misery for something that was beyond their control?

Would you condemn an innocent child to the misery of being born to someone who didn't want it, who in fact might hate it, because it would be a constant reminder of its Mothers violation?