Lean back and enjoy the ride

Lisa starts to flutter her fingertips over your glans, teasing them, making you shiver as she traced a mesmerising pattern with them. This continues for about a minute until you are harder than you've been in ages. You're eyes are still locked on Amber's handiwork next to you.

Meanwhile, Lisa switches from rubbing her index finger against the underside of your tip and began dragging her nails over it instead. "What the.." you blurt out as she does it again tracing those same patterns over your cock head with her nails instead of her fingertips, putting enough pressure on to leave white scratch marks in their wake. Lisa smiles innocently, she too is watching your face, observing every reaction.

You were too much into Amber from what you gather because she stopped tracing her nail patterns. Lisa is looking at you. She begins to squeeze your rod hard with her left hand, and her right hand starts jacking you off. She has your full attention now. She jerks you faster and faster, keeping her palm toward the top of your dick, just under the head, where she knows it feels good.

"Yeah, yeah, perfect," you say "Sehr gut". The sound of you urging her to continue the pleasure she is giving you, coupled with your thrusts, up and down, in rhythm with her strokes turns her stroking into a pumping motion with a tight grip. The grips is nearly too tight to be comfortable.

Every upwards strock came crashing down making you desperately want to grab hold of something. You are amazed at how talented her hands are. You notice her knuckles are white and the head of your cock is becoming a deep angry red.

You moan, grin and let your eyes roll back. You know now you are not going to last long. She licks your ear and begins jerking your dick for all she's worth. Her hand is flying up and down. You lift your ass off the chair and thrust it up for her, giving her even better access. "Come on!" you say. She is well aware that her technique was going to be too much for you. Still watching your face she slows and gives one last long stroke "Du bist meiner" and leaves your cock throbbing and aching for more.

NO STOP! You realise that this is already a form of informal contest!