At some point, Lea took her arms from around Caius' neck and reached behind her to grab the tree trunk. Her fingers dug so deep that they broke through the tree's bark and the look in her eyes was so intense as she used the leverage of her fingers deep inside the tree to push herself even harder into Caius' thrusts.
Caius kept his hands on her ass, letting himself revel in the feel of the ample flesh but his eyes were on the Professor's breasts, watching as they swung up and down enough to create slapping sounds of their own. A pleasing sight that was only furthered by how her insides kept working all over his cock still lodged as deep inside her as any space within her could allow.