Great theory. I think somebody forgot to tell nature though...
Also, I would say that if she consents to a certain action, she would be consenting to the possible outcomes of that action.
1, First, you misunderstand what nature and culture are.
If no one makes any human, and therefore cultural, law banning abortion, a woman who doesn't consent to pregnancy can choose to seek an abortion from a medical person, who can choose to provide one or not for a fee he/she specifies. That is natural, because freedom to seek one's own best interest or offer help for others' interests and negotiate reciprocally is an assumed baseline in natural philosophy.
But the moment you make a human, and therefore cultural, law banning abortion, you restrict that freedom to seek one's own best interest and offer help for others' interests. The reason this is such a problem is that all pregnancy/childbirth injures the woman in some measure. It is very easy to show evidence that pregnancy partly suppresses the immune system of a woman, that it stretches out part of her body and alters her body chemically in ways that deviate from normal health.
Thus, pregnancy/childbirth don't just increase the risk of illness, injury, and death. However, the worst is that women can die of medically unforeseeable causes in late pregnancy/childbirth. This means that, even if one makes a law banning abortion that carries an exception to save the woman's life, she can die such a death.
When that happens, you can't blame the medical professional for malpractice, because the profession of medicine has never officially claimed that properly practiced medicine can obviate all childbirth deaths. But neither can you blame nature - the act of God or natural disaster meme - because you interfered with nature.
You see, if the woman had a right to an abortion and a doctor a right to perform one, without the claim that the doctor had to have evidence allowing foresight into danger to the woman's life, she could just have had one and the doctor could have provided it, naturally. Then, she wouldn't have died.
So the blame falls on the supremely unnatural cultural law banning abortion and the individuals who made it. They will have committed criminally negligent homicide, FYI, because we have already told them multiple times that this will eventually happen, which is a good reason not to make such a law.\
2. Second, you are assuming that a woman consented to sex, and that this should make it okay to force her to accept responsibility for consenting to pregnancy. There are two problems with this.
--The first is that a woman's consent isn't necessary for pregnancy. They can be raped with superior muscular force, threats with weapons, to themselves and other people, little kids and sick parents, drugging, etc. Women in comas have been raped. A man could illegally enter a woman's house and rape her while she was asleep without waking her - she could have taken a sleeping pill.
Furthermore, if a woman unknowingly married a bigamist or became formally engaged before having sex, she didn't consent to pregnancy by a bigamist or being dumped by the guy - she has been legally defrauded.
--The second is that a woman's consent to sex is not consent to pregnancy unless that is a contingency to which she agrees. Why?
If she consents to piv sex once on Thursday with Mr. A, and with some type of contraception, she is only consenting to piv sex, not anal sex, only once, not twice, only on Thursday, not Friday or Saturday, only with Mr. A, not his son or daughter, not even her own son or daughter, and only with some type of contraception.
The implantation of an embryo that is Mr. A's offspring in the endometrium of her uterus, a separate sex organ, on Saturday night, is not something she consented to. If the embryo violating her uterus is his offspring, it's not him. Implantation in the endometrium isn't piv sex. Saturday isn't Thursday, etc.
If you imagine that this isn't true, go try getting some woman's consent to piv sex and then try using muscular force to have anal sex with her over her objections. Try getting a woman's consent to an act of sex on Thursday and then going to her house and entering without permission and trying to have sex with her while she's asleep on Saturday. See how fast you get reported to the cops and ultimately thrown in prison.