By Ayeesha Walsh Chris Hemsworth and Elsa Pataky showed off their toned physiques as they enjoyed a relaxing beach day with their children. The pair appeared to further squash recent rumours that they were growing apart by enjoying a surfing session in Byron Bay joined by their twin sons Sasha and Tristan, nine, and daughter India, 11. Elsa, 47, looked incredible in a skimpy pink bikini which showcased her toned abs and taut physique to perfection. The Spanish actress also layered gold chains and jewellery to accessorise her look and wore a baseball cap to complete her look as a cool mum. Mean…