"Da pool mus of do tis," Jacob babbles to himself.
He wished the speedo would get looser when he was in the pool, so it has to be the cause. He just needs to get in and wish to be back to normal. He's about to march out to test his theory before realizing there's two issues.
First, he's naked and that'll surely draw some attention. Second, he has no idea whether he is still going to be able to swim like this.
Jacob realizes his best bet is to head to the family section of the changing area and try to grab some stuff that'll help him. He jumps down off the counter and scurries over there. Once inside, he finds himself overwhelmed by the chaos in there as parents try to wrangle their small children into or out of swimwear. Worse is that many of those "small" children are way bigger than him right now.
He skirts around the edges of the room until he spots a diaper bag. Nervously, he slips a swim diaper out of it and pulls it around his waist, gulping as he finds not only is it a perfect fit it also feels comforting against his reduced rump. Jacob hopes Seth is long gone, he can only imagine the embarassment if Seth realized who he was while he was walking around dressed like this. Jacob grabs a life jacket off a rack and heads outside towards the pool.