User blog comment:The Shadow User/Solana Vakarian/@comment-217683-20101015042845

Why would he have mentioned having a sister, or that his mom wasn't doing well? What possible relevance could it have had? To anything, much less to two vitally important missions like stopping Saren and stopping the Collectors? Garrus is not big on revealing details about his personal life, after all. I mean, we don't even know where he was born. He didn't mention it because he didn't see the need to, and he didn't mention his father in the message to Solana because there was likely no need.