Gwyneth Paltrow showcased her stunning figure in a bikini as she sunbathed with son Moses Martin just days after he went public with his stunning Ivy League girlfriend. The 53-year-old A-lister took to her Instagram Story on Monday to share a selfie featuring her 20-year-old son whose father is Coldplay frontman Chris Martin. Paltrow donned a red gingham patterned bikini top as she laid in a pool lounger alongside Moses. The Oscar winner went make-up free as her blonde locks cascaded down a pillow as she kept her eyes protected with a pair of aviator sunglasses. The A-lister did not just get her tan on as her copy of 2024 Colm Tóibín novel…