For Amalia, the height of her boyfriend has never bothered her, much to the relief of Yugo, who for the longest time thought she might have not even noticed him because of that. Even though the two lovers were roughly the same age, Yugo's abnormal growing process rendered him around a head-and-a-half shorter than his girlfriend.
As a result, when the two were making love, Yugo's face would be often found somewhere in between Amalia's breasts - and truth to be told, she had absolutely no problem with that. There was one position the two teenagers did not try though, and it was pleasuring each other orally simultaneously. They both loved doing it to the other one, but they knew that performing it at the same time would require slightly more stretching on Amalia's part than she was comfortable with.
Thus when Yugo asked her they should try it, she was a bit surprised. She knew that Yugo's fingers would stimulate her as well as his mouth, but given the choice, Amalia would easily choose the latter. Sadly, the same could be said for Yugo - a handjob from a princess was nothing compared to the inviting warmth of her mouth all around his length.
Amalia made sure the door to her chambers was closed, and leaped to her bed, already occupied by her naked boyfriend. She turned around and crawled to her prize, giving it a few strokes before fully engulfing it. She could feel Yugo's hot breath just a few inches too far from her opening, driving her absolutely crazy.
And then, blue light flashed somewhere behind her, and Amalia felt her lower lips are being caressed by the delicate texture of Yugo's tongue. She moaned, letting go of his boyfriend's penis, turning around to confirm if Yugo really just did what she thought about. Two small portals were levitating in between his face and her crotch, shortening that insufferable distance, allowing both of them to taste each other at the same time.
With a smirk on her face, Amalia went back to tasting his inventive boyfriend, already thinking about the whole new world of possibilities that has just opened for them.
A.N.: For the record, using promotional pictures from S3 as a base and a bit of photoshopping, I have concluded that by season 3 Yugo would be tall enough to have 69 with Amalia (as opposed to S1/S2/Ovas). Clearly that was an intentional change by Ankama, thus confirming that Yumalia will be canon soon. That means that this prompt takes place somewhere prior to s3. This is what fanfic authors have to do to make sure that the sex scenes between two non-existent members of two non-existent races from a non-existent world are realistic.