Karla Souza has given birth to her third child following a “marathon” labour. The ‘How To Get Away With Murder’ actress and her husband Marshall Trenkmann recently welcomed daughter Giulia – a sibling for Gianna, five, and three-year-old Luka – into the world but she revealed it took a gruelling 33 hours for the tot to make her arrival, and despite the lengthy process, her doctor failed to produce a pain-numbing epidural in time. Sharing a selection of photos of the newborn on Instagram, Carla wrote: “After a marathon 33 hours of labor that stopped and started more times than a film production…