Tyra Banks shared an incredible insight into her family life on social media when she shared a heartfelt post featuring her four-year-old son York.The supermodel took to Instagram recently to share a beautiful picture of a rainbow that the little boy had drawn.MORE: Tyra Banks sparks reaction with new swimsuit photoIn the image, York's hands were seen holding his artwork, which also featured his name written out in yellow pen.VIDEO: Tyra Banks opens up about DWTSIn the caption, Tyra opened up