Alien Daddies by Sue Lyndon

On their world, bad girls are punished.
When nineteen-year-old Makenna stowed away on a departing spacecraft, she expected a short trip to the resort planet where her friends spend their summers. What she got was a year in the custody of six strict alien daddies with the authority not only to demand her obedience and punish her as they see fit, but to use and enjoy her beautiful body in any way they please.
Torin never imagined taking a human as his mate, but the moment he catches Makenna hiding in his warship’s cargo bay he knows she is the woman he will claim, master, and share with his brothers. She will be their little girl, and they will be the daddies she has always needed.
Though she is shocked to discover that she now belongs to not one but six huge, handsome alien warriors, Makenna cannot hide her helpless arousal when her soaking wet panties are pulled down for her first bare bottom spanking. As her new daddies set about showing her all the ways a naughty little girl can be made to blush, quiver, and beg for yet another shamefully intense climax, Makenna is left feeling safer and more satisfied than she ever has before. But when someone tries to drag her back to Earth by force, will she lose the men she loves forever?