Sam's back, and so are her bickering and profane offspring: "There's mean-girl issues with my youngest and birth control with my oldest. And then cruelty from my middle daughter." Yup, sounds like a new round of Better Things, FX's comedy series written and directed by its star, Pamela Adlon. But don't price it yet -- here's what else you'll receive with Season 3: clothes that somehow became too tight, "fun mom" crashing a go kart, prayers to the porcelain lord, the expat…