Which First Lady was both the wife of one president and the mother of another?

Which First Lady was a former librarian and teacher who promoted literacy? Which First Lady continued working as a college English professor while in the White House? Which First Lady was born in Slovenia? Which First Lady was born in London, the first born outside the U.S.? Barbara Bush was the wife of one president and the mother of which other president? Which First Lady is credited with effectively running the executive branch after Woodrow Wilson's stroke? Which political party did Abraham Lincoln belong to? Which political party did Franklin D. Roosevelt belong to?