Jeff Bauman and his girlfriend Erin Hurley are getting married and expecting their first child. Bauman — who lost his legs in the Boston Marathon bombings — announced the good news through his charity’s Facebook page Sunday. “We are so happy to share with you exciting news that has happened over the last few months. Jeff and Erin became engaged and are expecting their first child in the summer!!! Congratulations Jeff and Erin!!,” the message said. Bauman has a book, “Stronger,” coming out on April 8. It was co-written by Bret Witter, who worked with Robert M. Edsel on “The Monuments Men,” which is now a George Clooney movie.