Promised to the Aliens

Cinderella meets space
I am not really happy with working in my father's house as a maid, but thanks to my stepmother I have no other choice.
My sisters, however, don't think I should spend my existence in the kitchen. So, they secretly whisk me away to a fancy party.
It doesn't take more than a few seconds for me to get separated from my sisters and to attract the attention of a very attractive alien.
And to make things worse, I even lose my shoe…
Reverse harem sci-fi romance. Features an evil stepmother, three possessive aliens, and a heroine who's not used to being spoiled like that.