You are fine. It was an observation, not an admonishment.
[He does not intend to make his discomfort contagious; it is unfair to Ken, when Ken is only trying to share something he loves.]
[...but neither of them have said anything. Part of Siebren is relieved; the other is tense, still waiting, wanting to get the awkward conversation over with and move on-]
[But it is possible neither of them will say anything at all. Ken is polite, after all, and Wormmon is innocent. They may simply not mention it.]
[He sinks lower into the water and rests his back against the wall of the pool, trying to relax. He does not entirely succeed.]
no subject
[He does not intend to make his discomfort contagious; it is unfair to Ken, when Ken is only trying to share something he loves.]
[...but neither of them have said anything. Part of Siebren is relieved; the other is tense, still waiting, wanting to get the awkward conversation over with and move on-]
[But it is possible neither of them will say anything at all. Ken is polite, after all, and Wormmon is innocent. They may simply not mention it.]
[He sinks lower into the water and rests his back against the wall of the pool, trying to relax. He does not entirely succeed.]