Just keep swimming

Meh, Peter tought. It is probably just himself. So keep swimming. Although cold, the water was perfect, so Peter just relaxed, ignoring the fact that he wasn't wearing his swimtrunks. Fortunately for him, Anna and her sisters were inside, so they couldn't see that spectacle. However, soon, Anna and Lena come outside. While Lena toss herself to sunbathe, while Anna just relaxed reading a book. Peter continues swimming without suspecting anything, going underwater. And then, he goes towards where Anna and Lena were resting.

That's when Peter notices something in the pool. In the reflection of the pool floor, he sees something floating between his pubic area, when it shouldn't be there. However, previously he could think why he sees that reflection, Anna call him to eat lunch. Does he manage to understand his predicament?

1 - No, and he comes out of the pool in hs birthday suit.

2 - Yes, and he tries to do something to recover his swimtrunks.