Continue the handjob
From Create Your Own Story
You decide there isn't enough time to fuck Sara before the explanation is over so you decide to continue with the mutual pleasuring. You continue sliding your fingers in and out of her cunt as you add your thumb on her clit. As you apply pressure on it, she lets out a soft moan and starts jerking your cock faster.
After a few more minutes (yes, the instructor loved his long, detailed lessons), you were getting close to your climax. You convey this to Sara who informs you that she is close too. Soon, you feel Sara's walls clamping down on your fingers as she releases a sigh of pleasure and relief. This sends you over the edge as well and you release your load into the water with a grunt. As your cum floats up to the surface, Sara bends over and drinks up the pool water with your load in it. With a lick of her lips, "tastes pretty good but I guess it would be even better without the pool water". With that, the instructor finishes his lesson and you do laps for the rest of the time at the pool.
Too bad you couldn't fuck Sara but the handjob was pretty good consolation prize.