Ah the joys of seeing a slutty teacher getting pounded on her desk x3
Nice work, you can really tell how intensely they're going at it! Great job on the pose, and I really like her expression in the second version.
Internal cumshot is a fun bonus x3
The cup seems a little off, just something about the way it's positioned on the desk, feels like it should be facing more towards the viewer. The guy's skin tone is kinda pale too but I don't know if that's a character specific thing.