Michael's suspicions make Jane question Rafael's actions.

News about their baby's health causes Jane and Rafael to revisit the idea of moving in together.

Jane is finally in a rhythm with Mateo, but finds herself out of step with Rafael and Michael and the potential love triangle that is brewing between them. In order to not be sued for missing their Vegas arrangement, Xo and Rogelio must perform on a cruise ship. Petra and Rafael are suspicious of Lachlan and his recent business proposal, but are soon faced with an even more shocking revelation. Meanwhile, Alba makes a very big decision that will impact her life.

As Jane tries to juggle motherhood and school, she forgets to plan Lina's surprise 25th birthday party leading to friction between the best friends. Rafael tells Jane that he still wants a romantic relationship with her, but she is blindsided when he asks for joint custody. Petra tries to enlist Michael's help to keep Jane and Rafael apart. Rogelio's ex-wife, Luciana, is blackmailing him with secrets from years ago to get her role back on "The Passions of Santos." Meanwhile, Michael gets a new partner and a possible lead in the Sin Rostro case.

Jane and Rafael begin estate planning for Mateo, but when Jane realizes that Mateo will inherit millions, she worries he will become spoiled. Jane is also finally starting graduate school, but her professor is not sympathetic to her situation. Rogelio's famous show is ending, so he decides to create his own show, with Xo's encouragement. Petra is shocked to learn what she is having and turns to Jane for advice and help in getting her mother out of prison. Meanwhile, after Michael's issues at work, he has decided to go rogue and is even more determined to catch Sin Rostro.

Jane and Rafael are still at odds with each other as they are about to celebrate Mateo's first Christmas. Jane discovers that the scholarship she thought she had been awarded isn't quite that and now needs to find a way to pay for grad school. Rogelio has employed an intern and is having trouble trusting him. Petra is struggling with the latest dilemma her mother has gotten them into. Meanwhile, Michael is trying to find Luisa's mother who he now suspects is not dead and may be involved with Sin Rostro.

In the middle of the night, Jane gets a burst of creative energy and starts her thesis. Unfortunately, Mateo spills orange juice all over her computer causing it to crash and Jane loses all her hard work. When Jane brings her computer to be fixed, she meets Dax and with the urging of her friend Lina (guest star Diane Guerrero), Jane considers dating again. Rogelio decides to have his mother Liliana become his manager, but soon realizes that was not the best decision. When Rafael comes to after being attacked by his mother now known to be the crime lord Mutter, he goes to Michael.

Jane is considering whether or not to take her relationship with Jonathan to the next level and turns to Xo for advice. Xo and Rogelio have their own relationship issues to work out. Meanwhile, as a favor to Rafael, Jane agrees to help Petra by throwing her a baby shower. Luisa is in a terrible car accident, but all is not as it seems. Michael comes to a realization he must share with Jane.

Jane and Michael are back together and Jane wishes she had never left Michael in the first place. Rafael appears to have regressed to his playboy ways and Petra is concerned about him. But Petra is not aware that Rafael is helping Michael find Mutter's other son, Derek. Rogelio's new assistant, Paolo, is actually his stalker Lola. Finally, Petra gives birth to the twins.

Jane and Michael's wedding plans are side tracked when the Villanueva house is ruined by a flood. Jane is looking to have a small wedding, but Rogelio wants nothing more than to throw Jane a big blow out wedding so he can invite all his celebrity friends. Jane and Michael are also looking for the perfect home to move into and when they find a place 45 minutes away, Rafael has an issue being that far from Mateo. Petra is still having trouble adjusting to motherhood.

Jane has a specific idea of how she wants to celebrate her bachelorette party, but when Xo and Lina get involved, nothing goes as planned. Michael wants to enjoy a night out with his friends, but things get awkward when his future father-in-law, Rogelio, tries to plan the perfect bachelor party. Rafael is still trying to figure out what his half-brother Derek motives are and what he knows about their mother. Meanwhile, Petra gets a surprise of a lifetime.

When Rafael finally admits that he is over Jane, their co-parenting style is tested when they argue over what the best preschool is for Mateo. Xo is paranoid about Alba finding out her secret and what it will do to their relationship. Rogelio is ready to cross over to American TV, especially after he learns his nemesis is making the transition. Meanwhile, “Anezka” is trying to find new dirt on Rafael when she begins an unexpected romance.