As time goes by, they keep looking for the killer which causes the killer to strike again - this time killing Courtney on her wedding day before she was to marry Noah. This leaves Summer heartbroken as she has now lost her husband and best friend, and so Kyle remains by her side to help her in her grieving. Summer suspects Sharon as the killer, which causes a rift between her and Noah. Later, Summer attends a party with Kyle to get her mind off of everything. After the party at her house, Summer talks about Courtney then tells Kyle that she can't keep dragging Kyle into her misery but Kyle says that that's what he is here for and that they were family for a little while at least but Summer says she doesn't look at him and see a brother and Kyle says he's not and he never was. Summer looks at Kyle and says no you weren't. Kyle and Summer look deeply at each other and then kiss, which leads to them making love for the first time. Afterwards Summer tells Kyle that it feels so good to be with him. They both also say it feels so natural being with each other even after they were told that it was unnatural. Summer says that it was unfair that they were kept apart because of Sharon's lie. Then Noah sees them and gets mad because Kyle took advantage of Summer. After Noah leaves Kyle tells Summer not to feel ashamed, that what they did isn't wrong and that Noah is just grieving. Later Summer and Noah make up and he apologizes. Sharon is arrested soon after as evidence points to her. Noah defends her but Summer continues to believe she is guilty. Summer returns to Genoa City in June 2018, much to the surprise of Phyllis and Billy. Immediately, she makes her presence known in Genoa City, only to eventually be arrested for charges of felony theft auto; when bailed out, she explains she believed the car to be a gift from "Pax," with whom she was having affair with. Summer returns to town with resent towards her mother, Phyllis Summers. Summer takes a liking in Billy Abbott (although he is with her mother), and begins to make subtle, but unpleasant plays for him, such as wearing lingerie around the house, and getting Billy to give into his gambling addiction. Summer suspects trouble in Billy and Phyllis’s relationship, and enlists the help of Kyle Abbott to figure out what it is. Summer and Kyle initially suspect that her and Kyle’s father Jack Abbott slept together, however it is later revealed that Phyllis slept with Summers father, Nick Newman, while her and Billy were on a “break”.