I sure a few of you caught this I believe you need to the "spacer" background for it to come up. While talking to Hackett on the vidcom at some point he will give you a "by the way" message about your mother saying she has been called back to active service and is assisting with the crucible project. I found this tidbit very suprising due to the fact you never here about his/her parents except for the background choice. I assumed they were both dead no matter the background chosen due to the zero communication from the first game to this point. Even after you come back from the dead. Not even a text to say "Hey mom I'm alive again. Sorry for not calling for 2 yrs". She doesn't even call you and Hackett almost forgets to tell you like you even gave a F*ck.