I saw it more as a reassuring type of dirty talk. I can see why it might come across that way out of context, though. But consider how much of their earlier conflict has revolved around Shuraka wanting Tei to see him as a man, and remember how Tei wasn't exactly enthusiastic about it. The reassurance also felt warranted given the insecurities both of them have had surrounding each other and sex throughout the story.

Cmon guys I can't be the only one that got pedophilia vibes from this chapter. Like the way the mc was saying he was glad the ml grew so well to be able to fill him up that deep, sounded like he was just waiting for the ml to grow up so they could fuck