The mamas need more dressing rooms! Construction is underway to double the size of the Hot Mama store at Shops at West End in St. Louis Park. Work should be completed by the end of October. Meanwhile, at Shoppes at Arbor Lakes, Hot Mama is moving into the former Sharper Image space the first week of November. Expect a bigger selection and wider aisles. And one last update (today, anyway) on the rapidly growing Edina-based chain: the new store at Woodbury Lakes is now expected to open in September.