When you watch Jane the Virgin Season 3 Episode 18, you'll see Jane and Fabian finally seal the deal, but not after firmly establishing their relationship is strictly a fling. Elsewhere in the episode, Jane and Rafael explain to Mateo how their family formed. Xo and Rogelio reveal their engagement. Petra accuses Chuck of murdering Scott, but he says reveals he spoke to a woman that night who could be responsible. Petra hears Rafael's love voicemail, but isn't able to tell Rafael what she wants due to them being interrupted by the police with a sketch of the woman Chuck talked to.