"and to your maid-servant, too, shall you do thus": to bestow. I might think, also to bore the ear; it is, therefore, written (Shemoth 21:5) "And if the man-servant say, etc." The man-servant, and not the maid-servant.
"It should not be difficult in your eyes to send him away... for double the wages of a hired worker he has labored for you": From here it was taught that a hired worker works by day while a hebrew slave works both by day and by night.