Roxana, The Fortunate Mistress by Daniel Defoe

And thus, in gratitude for the favours I received from a man, was all sense of religion and duty to God, all regard to virtue and honour, given up at once, and we were to call one another man and wife, who in the sense of the laws both of God and our country were no more than two adulterers, in short, a whore and a rogue. Nor, as I have said above, was my conscience silent in it, though it seems his was; for I sinned with open eyes, and thereby had a double guilt upon me. As I always said, his notions were of another kind, and he either was before of the opinion, or argued himself into it now, that we were both free and might lawfully marry.

But I was quite of another side, nay, and my judgmemt was right, but my circumstances were my temptation; the terrors behind me looked blacker than the terrors before me, and the dreadful argument of wanting bread, and being run into the horrible distresses I was in before, mastered all my resolution, and I gave myself up, as above.