What does 2 Samuel 14:7 mean?

'Now the whole family is demanding that I hand over my surviving son so they can put him to death for killing his brother. If they do that, I'll have no one left—my husband's name and legacy will be wiped out.' 2 Samuel 14:7 - Modern Text Bible

(She appeals to David's sense of justice and mercy, highlighting the risk of losing her entire family line.)