Kate Hudson is such a cool mum, so much so that her teenage son Ryder, 16, loves nothing more than hanging out with her.The How to Lose a Guy in 10 Days star delighted fans after sharing a rare video on Instagram featuring her firstborn, who was trying to distract her as she gave details of a recipe for a watermelon mojito.MORE: Kate Hudson opens up about her relationship with oldest son Ryder VIDEO: Kate Hudson tries to do yoga while looking after daughter RaniIn the footage, Kate was in the