Megan Fox’s ex-husband Brian Austin Green’s fiancée Sharna Burgess has congratulated her on her pregnancy. This week the 38-year-old actress – who already has Noah, 12, Bodhi, ten, and Journey, eight, with 51-year-old actor Brian – confirmed via social media that she’s expecting her first child with Machine Gun Kelly. Alongside a photo of her naked body covered in black paint to reveal her blossoming baby bump and a snap of her positive pregnancy test, Megan wrote on Instagram: “nothing is ever really lost. welcome back [baby and heart emojis] (sic)” Dancer Sharna, 39 – who has son Zane Walker…