My sources indicate that they were living separate for a short time. IMO even though two people are separated, they are probably still talking, maybe even trying or contemplating working it out......and one of these "talks" leads to sexual relations.
So, Janet could have gotten pregnant in January while they were separated and then once she discovered she was pregnant (in February or March?), they moved back in with each other. We should probably start an address timeline showing the addresses of where Raven lived and the dates he lived there????