Y/n was sent by The Handler to Spy on Five & siblings in Dallas in 1963. And five figures out she's been working for The Handler so Y/n tried to stop Five from leaving her,

You: "Five, wait im sorry.."

Five: "Why should i? You betrayed my trust y/n."

You: "Cause i dont like nobody better than you."

Five: "That can't be true, you hated me from the first time we met."

You: "Its true! I even will betray the commission. And the Handler, just for you!"

You blurt the truth out finally.