Jesus spots Lexi having some trouble hanging her campaign sign, so he lifts her up to fix it, much to her surprise and delight
Jesus asks to have one of Lexi's campaign cupcakes, and quickly makes up the excuse that he is hungry, when he could really be wanting to support Lexi instead of Mariana in the bid for the presidential seat
Lexi agrees to go on a double date with Jesus, Mariana, and Nick
Lexi willingly leaves the table with Jesus to change the music
Lexi asks Jesus if he is really interested in her, and if he really wants to be out with her, or if he really wants to sabotage Mariana's night out with Nick. Lexi appears happy when Jesus says that he really wants to be there with her.
Lexi and Jesus kiss
Lexi takes off with Mariana after Nick almost gets them in a car accident, and Jesus calls after her, while Lexi looks hurt that the guys got them into a dangerous situation
Lexi attends the sixteenth birthday party of Mariana and Jesus and, when they return to the Adams Foster house, Lexi kisses Jesus for being brave and for his birthday, for going with Stef to drop a high Ana off at her home. Lexi also sees Gabe briefly, and Jesus tells her that he is his birth dad.
When Jesus and Mariana are opening presents, Lexi is standing right next to Jesus and they are seen laughing and flirting
In The Morning After, it seems like everyone is accepting their relationship except for Mariana.
Jesus and Lexi had sex in The Morning After. It is implied they lost their virginities to each other. As a result of not using protection, they feared the possibility of pregnancy and sought to have Lexi take a morning after pill. After much hesitation, finally gave her the pill.
Reason: Lexi discovered Jesus' initial plan to break up by stumbling across his deleted email doing so. She ended the relationship herself when lying that she kissed a boy in Honduras and wanted to move on