Yeah, that's in Danse Macabre. After the OMG FLAIL FLAIL NOEZ of the whole deal, they came to the conclusion that oh dear, they should start using condoms again. Everyone. And I think Anita would going back on the pill? I have been headdesking so hard about that book, I might have concussed some of the details away from my brain.

Augh. Now if only I can banish the memory of liquid soap lube.

EDIT: Actually, when Anita first had sex with Jean-Claude, they used a condom. I remember being all "ooh yay, safe sex! Yippee!" when I read the scene, but that was the one and only appearance of any kind of prophylactic once Anita started to have sex up until the whole pregnancy scare.