You're certainly not being dumb; your insights are going to inform how you enjoy any story! The setting Void Dreaming takes place in is pretty easy-going about sex, and these two have known each other for quite a while. Things make sense from their perspective, even if Rael, and you, are an outsider to it. How you feel about it is all up to you, though!
And thanks so much; I'm glad to hear you think Void Dreaming is peak! I hope to only make it even more awesome as time goes on!