blimp:
Difficult one. How about if it was the other way round, the woman poking holes in the condom so she might conceive? I ask this question as we know a couple where the wife, in her thirties, desperately wants a child and the husband doesn't. She is on the pill and may on the quiet stop taking it! I can't help thinking the chap is being selfish but I may be prejudiced as I greatly enjoyed family life.
I'm pretty sure, since they're married, that it wouldn't be illegal at all. It might certainly cause hard feelings and possibly divorce, but there's no crime there, since it's within the context of a marriage. There's a number or exceptions and legal privileges that married couples enjoy, that others don't. I don't think the husband would have any legal recourse either, even if he didn't want to be a father. He can't do anything about it and even if he leaves, he's still on the hook for child support for at least eighteen years and probably alimony too. He might refuse any other legal responsibilities and even refuse to acknowledge or have anything to do with the child but then of course he'd be a total, giant, gaping asshole of a human being, even if his wife deceived him. I'd also advise him to get a DNA test on the kid ASAP. It might all be a false alarm, at least as far as he's concerned.