You leave the twins and Simon to it

You luxuriate for a while in the feeling of two svelte, naked bodies pressed against yours in the too-small bed. The girls show no signs of restlessness, their breathing slowing to normal more quickly than yours. You're in no rush to get up, but before long the gentle sound of Simon snoring disturbs your peace. When you open your eyes, refreshed, you find twenty minutes have passed and decide that it's time to make a move.

You stretch and groan in satisfaction and the two lovelies beside you sit up in response.

"Well, this has been truly delightful," you say, "but I must sadly bid you adieu. No, no," you protest insincerely at the disappointed noises your hostesses make at the news. "I have to go. I trust you can look after Simon when he wakens and make sure he has a good time that reflects well on the university?"

"Of course, Professor," replies Astrid, whilst Alice fetches your clothes and helps you dress. The sisters exchange a look and then she continues: "We really enjoyed the date and learned a lot from you and we were wondering…"

"…whether you'd consider seeing us again, just the three of us?" The other sibling concludes the sentence.

You pretend to consider the offer while the two stunning blondes look on anxiously, but there's no chance you would pass up an opportunity to debauch two of the prettiest girls in the whole university, let alone twins. They may only have agreed to the double date because they wanted to meet Simon, but it's obvious they now consider you the catch. A few months ago, you would've been surprised at your ability to seduce women so far out of your league, but amazingly, you're getting used to it. Although you never specifically made it a rule in the Rulebook, some unintended consequence of your meddling has made you and men like you irresistible to a certain type of young lady.

The Palmes accompany you to the door of their room and give you a simultaneous kiss goodbye on either cheek, taking the opportunity to press their shapely boobs against your chest as they do so. You give them a quick hug and promise to make another date soon, then bid them farewell with a slap on the bum which makes them squeal in delight (and a little pain, but mostly delight). They go back to their other guest, still snoring blissfully, whilst you wend your way back down the stairs.