T: You deserve to... be happy with someone. I can't do that. No matter how much I... I could get sick. Jeopardize the mission.
S: Are you saying you could die if we were together?
T: It's always a risk. Maybe the reaction would be minor. Maybe it would put me down for a few weeks. Or maybe it would kill me. But... That's not what I'm concerned about, Shepard. I don't want you distracted. I don't want what I want to hurt this mission. It's too important.
S: And if you weren't jeopardizing anything?
T: If it were just me? You risked your own life to save the colonists on Feros, two years ago. Nobody else could have saved them. I watched your face as Lieutenant Alenko died on Virmire. I watched you stand strong against everything the galaxy threw at you. I've watched you for so long... And I never imagined you'd ever see past... this.
S: Tali, if you are scared, I don't blame you. But I don't want anyone else. I want you. And I'll do whatever I have to to make this work.
T: I... I wouldn't blame you, if... But... Oh... Thank you. You don't know what that... Thank you. Give me a little time. I'll do some research. Figure out how to make this work.
S: Do your research quickly, Miss Vas Normandy. Captain's orders.