Backgrid USA Kaley Cuoco is running some errands after sharing the exciting news that she and her fiancé Tom Pelphrey are expecting their second child together! The 40-year-old star of The Big Bang Theory was photographed on her phone as she fueled her car at a gas station in Los Angeles on Tuesday (June 16). This is the first time Kaley has been spotted publicly since she and Tom shared the happy news last week. Credit: Backgrid USA For her out…