A sex lesson

"Tell me, girls," you say on the journey back, "do you both have plenty of experience pleasuring a man?"

"No, sir," replies the elder. "We are lesbian, er. Himari is tipping, er, much. That, er, is all, er."

You're not surprised the submissive half of the couple has been called upon to tip with sex during the holiday. Both the tourists are extremely pretty. However, you ideally want to have both of them.

"Her tips have been satisfactory, then?"

The two exchange a glance and then Yuina answers you again.

"She is punish, er, for in-ad-i-quater service, er, two, er, time, er." She stumbles over one word, clearly trying to repeat what the spanker said at the time.

"Ah, well, if you'd like, I could help you both practice. I expect you'll both be giving lots more tips before you go home, so it would probably be best to get some experience while you can."

The dominant stares at you for a moment and you can't read her expression, but then she thanks you and agrees to take you up on your offer, although the tremble in her voice and fresh tear in her eye makes you think she's less than keen. Perhaps she feels obligated to accept, or is worried the consequences of failing to tip properly are worse than the prospect of sex with you, but either way, you're close to getting what you wanted.

"You, too, Himari?"

The younger woman gives a start, before saying yes, but you're not sure she was really following the conversation. Nevertheless, you start imparting advice, partly concerning techniques, but mainly attitude and the importance of eagerness. After all, the point of a tip is to show their gratitude, so they should be happy to get the chance to give pleasure to the man who's just chastised them.

As soon as you get back to your room, you give them a chance to demonstrate what they've learned, but they still seem hesitant and unsure what to do, so you offer some guidance to start.

"Help me undress whilst you kiss me and press your bodies against mine. Be seductive."

This is something they can do. Working well as a team, Yuina bends at the waist to undo your shoes, planting kisses on your toes, whilst Himari nuzzles your neck and tackles the buttons on your shirt, her boobs rubbing against your chest. You explore their bodies with your hands, testing their willingness to be roughly manhandled. They pass, moaning when you encounter the results of their earlier chastisement, but pushing towards you, rather than shying away.

Soon naked, you back over to your comfortable chair and sink into it, your two companions climbing on to grind themselves upon you. It's very nice, but you suggest one deep throat your cock and the other alternate between sucking your balls and tonguing your arsehole. They slide down to their knees on the floor immediately and you hear a gasp as they come face-to-prick with you.

"Something the matter, girls?"

"No, er, sir. Very big, er."

You stifle a snort of laughter. You have become more erect since divesting yourself of your clothes, but very big might be somewhat of an exaggeration. Anyway, it doesn't stop Himari stretching her mouth round the head of your dick and sucking, while she moves her tongue clumsily from side to side on the underside and wraps one hand round the shaft.

"No hands," you remind her, "deep throat it all the way to the base."

She struggles to get it past the entrance to her gullet whilst her girlfriend gags on the taste of your scrotum and you impart further advice to improve her technique. It takes a little while, but before too long (and with the help of your hand on the back of her head), she's sliding her lips along the length of your manhood, tongue swirling tantalizingly and even her retching adding to the stimulation. Meanwhile, Yuina is licking your bum hole with such wild abandon that if you didn't know better, you'd think she was loving it.

Soon, you're fully erect and ready to move on to the next stage of the lesson.