Geri Horner soaked up the sunshine alongside her sweet son Monty, five, as they twinned for the most perfect summer outing.MORE: Geri Horner on baby number three with husband ChristianTaking to her social media on Saturday, the 50-year-old shared the sweetest update with fans as she and her son - whom she shares with her husband Christian Horner - rocking glamorous bucket hats whilst sitting in an open-top Jeep as the sun set.WATCH: Geri Horner's cheeky racehorse finds a snackCaptioning the post, the former Spice Girl wrote: "Happy Sunday. Enjoying the sunshine." The star also shared a photo showing off her stunning white ethereal gown which she donned for the sun-kissed day out.READ: Geri and Christian Horner's epic homes unveiled as £440m fortune announcedSEE: Geri Horner looks flawless in white swimsuit as she marks birthdayFriends and fans went wild for the update and took to the comments section to leave messages for the star.