I did a roleplay once where I returned 5 years after raping a woman and found that she had my daughter. The husband didn't know about the assault so with the threat of convincing him and everyone it was an affair, I blackmailed her. Instead of the Catholic idea I like scenarios such as that one, where the couple hadn't had sex in years and she thinks this baby will save their marriage. Or, they had been trying to have a child for a long time and couldn't - then the rapist imgregnates her. Both situations would require the woman never reporting the rape nor privately telling her husband, unless he accepted it, which would be a very interesting issue. This actually happened in an episode of SVU, if you recall that one Sin?