Nightmare x Yandere female reader

what happens when princess y/n princess of the moon and her 2 sisters get seperated and are lost in different Au's? What'll happen when she meets the 2 guardians and falls in love with one? Will her evil side take over and go a little over the edge to protect him? Will she be able to control his dominant perverted evil side as well? And what of her 2 sisters where are they? Will the 3 finally be united? Or will there be a decision between her family and best friend or her lover?

WELK WGAT ARE YA WAITIN FOR READ AND FIND OUT BOI!!!!!Also iwarning I might add lemons!!