So she can't afford a baby right now and wants an abortion.
My sympathy is zero. (S)He got lazy and complacent and put trust where it shouldn't have been, and now (s)he's trying to get out of the consequences.
Since we're dealing in hyperbole, then I shall characterize your position as desiring to defend everyone from all negative consequences of any of their actions, no matter how stupid.
That sometimes people are stupid and deserve to reap the consequences of their actions, even if they were being deceived.
Physically, a (wo)man has complete control over (her) reproductive potential. (S)He can abstain, (s)he can have non-vaginal intercourse, (s)he can use (an IUD), (s)he can (do coitus interruptus), (s)he can use a spermicidal lubricant. If (s)he decides not to use one or more of these five methods to control (her) own reproduction, then (s)he is basically ceding control to chance and the goodwill of other people. (S)He is not taking responsibility, and therefore (s)he has little grounds for complaint when things don't turn out as he wishes they would. "Oh, butshe lied to me!" doesn't cut it, becauseshe was only in the position of power because (s)he put her there. (s)He had control and (s)he gave it up, willingly.
It seems anyone can do as they please without taking responsibility for their actions, and yet still cry for assistance and sympathy when the predictable consequences ensue. You touch the stove, you get burned. You drink the poison, you get a stomachache. You **** someone of the opposite sex without protection, you get a baby. Wah wah wah. Who could have seen that coming? Everyone, that's who. It's pretty common knowledge where babies come from.