A tip seems the most straightforward way

When you suggest Dr. Blake contacts Tilly's bosses whilst the girl herself tips you, everyone seems quite eager to make it happen. The chastened former student is understandably invested in proving to you her gratitude for your assistance with her discipline, since a less charitable man might consider the mere fact that you bought up the matter before she did sufficient reason to resume her castigation. Your devoted grad-student is always a supporter of your plans and helpfully offers to return the lash to your room on her way back to her normal duties, but it's the way Sharon falls in with your wishes that gives you the greatest satisfaction, deferring to you despite being officially your equal in the college hierarchy. She even goes outside to make the call, leaving you the privacy of her room to enjoy the young woman's charms.

The charms prove extremely enjoyable. Given the level of agony inflicted upon her pudenda, there was never any question how you would choose to be tipped and soon enough, the lovely twenty-something's riding you passionately, gorgeous tits in your face while she bounces energetically on your prick, mewling with anguish as she tortures her aching cunt for your pleasure.

She's one of the most talented lovers you've taken, bringing you quickly to the brink of climax, her tears and gentle cries of suffering doing much to complement her undoubted skill. She prolongs her ordeal by holding you there, at the pinnacle of ecstasy, for what seems an eternity, until you explode inside her with a roar of such intensity that you feel almost faint. She kisses you deeply and continues to gyrate upon your softening dick until it stops being pleasurable, then slips to her knees at your feet with only the slightest sigh of relief, using her mouth to clean away the remnants of your coupling.

You stare down at the top of her head, bobbing away, appreciative of the chain of events that led you here, while you catch your breath. She sucks your balls and licks your perineum, her gentle ministrations only failing to rouse you for a second time due to the **** of your fulfilment the first time. You'd love a repeat performance, but you might not be ready for quite some time and it's not fair to monopolize another fellow's room indefinitely, so with a little regret, you pronounce yourself satisfied and send Tilly to inform her former tutor that you've finished, whilst you don your clothes.

It turns out she's already managed to cut through the bureaucracy to get through to the bosses in person, but they seem **** to admit that their company has a problem. Dr. Blake is a successful and resourceful woman, but maybe you ought to give your assistance.