Roman Anthony's sister, Lia, is enjoying the summer while the Boston Red Sox rookie is in the thick of the action in pursuit of a postseason spot.On Sunday, Lia shared a glimpse of her poolside fun with her friend Brooke Basore. Lia shared a picture of herself in a red bikini and captioned the Instagram story with three strawberry emojis.(Image source - Instagram)Basore also featured in Lia's Instagram post last week with the duo holding hands on a beach. Their friend Kyleigh Dana was also present, sitting alongside Lia. View this post on Instagram Instagram PostLia Anthony became an overnight sensation on social media after she was seen in the stands at Fenway Park during her brother's MLB debut against the Tampa Bay Rays on June 10. She was present along with her parents and grandparents. Her Instagram following shot up from 3000 to more than 37,000 in around two months.Roman Anthony's sister Lia reacts to Red Sox rookie's contract extensionRoman Anthony was one of the most highly touted prospects in the Red Sox's farm system, and the rookie outfielder has lived up to expectations since making his debut. The Red Sox signed him to an eight-year extension worth $130 million on Wednesday."I couldn't think of a better city to play in [for] the next eight to nine years of my life,” Anthony said after signing the extension. “And I'm super excited. I want to thank all the fans who show up every day and continue to support us regardless of the outcome."Lia Anthony shared her excitement about the rookie outfielder's new deal in an Instagram story."So beyond proud of you!!!!" Lia captioned her story with three heart emojis.Roman Anthony is batting .280 for the season with two home runs and 20 RBIs. He could be in the running for the AL Rookie of the Year award.