Public Nudity/grab and inner tube then get in
You walk over to the shed that holds the pool toys for public use and fish around until you find what you want.
Stepping back you hold in your hands an inflatable inner tube colored with a splotchy pink and white pattern. It wasn't the biggest one you could find, but it wasn't a child sized one, so it should be big enough for you to sit in. It had occurred to you before that getting in and out of an inner tube could provide plenty of ways to covertly strip off your bikini while passing it off as an accident, making it perfect for today.
You make your way back to the pool side. Nobody seems to have really noticed you yet, but you don't let it bother you as you climb into the refreshingly cool water, it just means you have a little time to set up. You take the inflatable ring and force it underwater, trying to get it in position for you to sit in. However, where you entered the pool you have to stand on your toes to keep your chin above water, and struggling to keep the ring down causes you to lose balance. You slip beneath the surface for only a moment before you rise above it again. Thankfully you managed to take a breath before you went under.
Well, you're sitting in the inner tube, but that wasn't how you intended it to go, and as it stands you're sitting a bit low in it and can feel the ring around your thighs and lower back. Looking around it seems nobody noticed what transpired and looking down you see your top is still fine, but not your bottoms. It seems that the inner tube had pushed them down your legs as your body fell through it and now they're resting just above your knees floating on the surface inside the tube.
It takes you a moment to register the position you're in. With your bottoms around your knees almost it means your pussy and anus are on fully display beneath the water. This wasn't what you had planned, but was much better than you were hoping for. You readjust in the tube to a comfier position but make sure that your exposed parts remain where they are.
You feel a heat building in your core as you slowly move your ring away from the pool's edge, and idly note how your bottoms blend in almost perfectly with the pattern of the tube.
As you wonder what to do next, it seems things are still out of your control as someone calls out to you.
Turning your head you see: