The extended Spears family hit the pool at the Four Seasons in Houston yesterday while Britney was off prepping for a show on her Femme Fatale tour. Her sister, Jamie Lynn, threw on a bikini to swim with her toddler, Maddie, while Grandma Lynne Spears was in a swimsuit, showing off her amazing figure in the water with Jayden James and Sean Preston. Jason Trawick even stepped out to say hello to the gang, though he wasn't dressed for swimming in a pair of sneakers and a knit cap. Britney and Jamie Lynn's dad, Jamie, emerged to sit on deck chairs and eat with the family, too. It seems Britney's nearest and dearest have been able to join her for the southern leg of her travels. The Spears were soon off to New Orleans for Britney's next show. There weather in her home state of Louisiana wasn't as nice, since Britney tweeted about it being a rainy day. That didn't stop Jamie Lynn from heading out to shop, and she shared a photo with her Twitter followers of a funny shirt she spotted. Britney has today off, and then it's back to California for a show tomorrow in Sacramento.