After Jane discovers Mateo’s abduction, chaos ensues, especially when they all learn Sin Rostro is involved and demanding a ransom. Jane must also focus on motherhood and turns to Xo and Alba for help, leaving Rafael feeling left out. Meanwhile, Petra is conflicted with what to do with Rafael’s remaining sperm sample.

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.

When a slot opens up in the graduate program that Jane has been waiting for, she is faced with her first big motherhood dilemma -- leaving Mateo sooner than expected. Rafael is still reeling from Petra's news as he tries to help plan Mateo's baptism with Jane. Xo helps Rogelio confront his past even though it makes Xo uncomfortable. Meanwhile, Michael takes some advice from Rogelio about how to handle Jane, but it is easier said than done for him.

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 thinks she is finally ready to make a decision about her love life. Alba has taken the proper steps to become a citizen, but Xo's past might make it more difficult than anyone was expecting. Rogelio learns that his nemesis, Britney Spears, is at the Marbella Hotel and he is determined to confront her about their past. Michael is so caught up in his ongoing feud with Rafael that he ends up in big trouble at work. Meanwhile, Petra gets an offer from her ex Milos she just can't refuse.

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 interview potential babysitters to help take some of the pressure off everyone, but Jane has specific and lengthy requirements. Jane attends her graduate school's Christmas party in hopes of finding the perfect writing advisor, but things don't go quite as planned. Rogelio is faced with a tough decision about the direction of his life. Petra wants a friendship with Jane, but her mother's antics once again thwart those efforts. Meanwhile, Michael's suspicions have turned out to be true and he thinks he has discovered a lead on a possible rival to 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.

Jane's latest parenting obstacle is sleep training Mateo, a struggle that has the Villanueva woman divided on what is the best method. At the same time, she is beginning her new job as a TA and is faced with a class full of basketball players looking for an easy A. Petra confesses all to Rafael and is determined to put her mother away for good. Rogelio's mother Liliana comes for a visit and reveals a 40 year old family secret. Meanwhile, Michael discovers the truth about Luisa's mother and new information about Rafael's mother.

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's crush on Professor Chavez is popping up in her dreams and she needs to evaluate her feelings towards him. Xo and Jane find Liliana's engagement ring and think that Rogelio is going to propose. Rogelio IS planning to propose, but with a different ring, one that gets swallowed accidentally by Mateo! 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.