Perhaps because my comprehension of spoke English is way worse than for written English ; meaning that I took more attention to the characters than to what they said. But for me it's more him trying hard to fit in her ideal man's pants. Which change nothing to the implied M/S incest and, in fact, feel like the introduction of any average Ren'py games few months ago.
This said, amazing to see the difference in communication between countries. You've a really deep story (a son trying to keep alive the memory of his dad, by searching what they both have in common), while we have something more on the side of, "enjoy your stay while eating something made with local products".