Asking about what bad things will happen, of course you already know the answer. You don't have to wait for answers from other people. If someone has your wallet phrase and it only contains $14 then throw it away and forget it, create a new wallet and secure the phrase. But why someone else owns your wallet phrase is a serious question. you need to evaluate what you are doing so that other people have it. The wallet phrase must be stored properly and don't let anyone have it other than you.