Would you feel better if she did this for free?
While I'm not sure it would make it OK by me, I do think it would make a big difference. With respect to the libertarian argument about consent, there would be no question that a woman doing such things for free wasn't doing it because of financial coercion or desperation, though there would still be the question of other forms of coercion. For example, a Japanese drama I once watched had a scene playing on the reputation the yakuza has in Japan for forgiving debt for women who can't pay back loan shark loans if she'll make a porn movie for them. Not sure if that really happens or how often it happens, but I don't think that qualifies as "consensual" any more than statements hostages make seemingly willingly are "consensual".