Ask for a better salary. If you're a rockstar lawyer they'll likely give it to you. If not, then fuck off to a competitor.
Good litigators quickly become well known in the field.
Lawyers can be fuckin rats, and if they don't give two shits about their most important assets (human resources) then it's definitely a red flag slapping you in the face telling you to jump ship.
Edit: just properly read your first post. Nvm about asking for a better salary, as they'll know your friend didn't keep her word on not telling anyone.
Try to get hired by a competitor, then when you get a better offer you tell your current boss about it and that you want to take it. You'll hold all the cards.