Lottie Tomlinson has been seen looking gorgeous as she was pictured stepping out with her blossoming baby bump in full view.The 23 year old sister of One Direction star Louis is expecting her first child with former tennis player Lewis Burton less than two years after the pair went Instagram official together. Blonde beauty Lottie, who recently detailed her other half's reaction after revealing she's pregnant to him, donned a black ribbed mini dress with cut out detailing around the cleavage as she stepped out for the Oh Polly and Bo & Tee events at London Fashion Week event in London.The skin-tight short number, which featured long-sleeves and a hem line that ended above her knees, brought attention to her growing baby bump.