Let Lena finish

Too aroused, you allow Lena to keep servicing your clit with her deft tongue. The professor watches the both of you, making gentle, encouraging remarks. Lena fervently and loyally, without hesitation or any sign of slowing, continues to circle your throbbing clit. You moan, relaxing into the chair and focusing on your orgasm. Lost in this trance, you don't notice the professor has come to stand over you both, slowly stroking his cock just inches from your face.

You feel yourself shaking, quivering, and cumming loudly. You catch your breath, open your eyes, and are immediately greeted with splatters of the professor's cum right on your red and sweating face.