Tali

"I bet you wish you kiss me when you had the chance?"

- Ali to Toby in Juvie

Tali is the the pairing name between Toby Cavanaugh and Alison DiLaurentis. It is really not known what type of relationship they have together.

Season 1
In The Jenna Thing there is a flashback where Ali and the girls are trying on clothes when Ali announce that she saw Toby peaking into the window. To get him back she throw a stink bomb into his garage and it goes off with Toby and Jenna in it.

In the To Kill a Mocking Girl Spencer has a flashback while at Noel's Cabin where she Ali and Toby arguing. Ali tells Toby to take the blame or she going to tell everyone about him and Jenna.

In There's No Place Like Homecoming the girls realize what Ali was blackmailing Toby with. It was revealed that Ali knew about Toby and Jenna sexual relationship

In "Keep Your Friends Close," a new piece of evidence, (a bloody sweater, in Toby's possession, that Alison was wearing in the video of the night she was murdered), leads the police to announce that Toby is officially wanted for the murder of Alison DiLaurentis,

Season 3
In "Out of the Frying Pan, Into the Inferno", Revealed in a note conversation between Ali and CeCe, Toby was visited by Alison in juvie who laughed at the sight of him and his doo-rag. She tells him to stop sending the "A" notes, but he has no idea she is talking about. They talk about Jenna and he says he would like to help the person who is sending the messages. Ali replies with: "I bet you wish you'd kissed me when you had the chance" before Toby still wearing the wearing the doo-rag, signals for the guards to take her out of his room because she couldn't stop laughing. (This means that Ali probably tried to seduce Toby at some point but was unsuccessful - though why she would be interested is anyone's guess.)