Cock Ping-pong. Until the Double Shot!

When I'm out with my stepsister, I can be sure that something cool or unusual is always going to happen. It usually involves dicks or cum. And that's exactly what happened today. We were on vacation in Mallorca and were looking for the way from the beach to the parking lot. Somehow we got sidetracked and came across a hut where, stupidly, we caught a guy jerking off in the pool. Of course, we immediately went to the pool, where I took his hard-on deep into my mouth. My God, the sight of that cock turned me on so much. I sucked that hard-on with pure lust and devotion. My stepsister was waiting at the other end of the pool and couldn't wait to suck that cock too. We pushed that thick cock back and forth in the pool. Where would he cum first? On me or on my stepsister? Or could we find a way to make us both happy? I love our new game: cock ping pong.