My personal theory is that Mei sexually assault Yuzu whenever she was in sentimental mess and just use Yuzu like something to discharge her emotions. Now she is have no real problems on that side, she don't feel like sexually assault Yuzu.
I suppose this is one of those statements that should be preceded by, “With all due respect,” but—that’s ridiculous.
Ever since chapter 8 of the original series, the physical intimacy (while there was any) between Mei and Yuzu was obviously based on mutual romantic attraction and sexual desire. Period.
That’s the whole point of the first volume—the transformation of Mei’s initial sexual aggressiveness from emotional dysfunction into a sincere mutual desire.
The bulk of the main series demonstrates that “sexual assault” and “monastic chastity” are not the only two possible options in a personal relationship.