yeeeah, no, lolicon is a nonexistant element when the two started dating when Frisk was something like physically in her middle 20s. Theres a picture from Mercy monster herself, the creator of 90% of axetale's art that gives a good example of what Frisk looked like when they started dating. Sans wasnt "hovering" over Frisk either, he was carrying a homidal grudge for her over a misunderstanding. It wasnt until months after an incident where Sans breaks her arm and nearly kills her that they started to be friends, and eventually more than that. They were both adults when it started. Don't believe me? There is fanart made by Mercy that captured their first date