To forestall this mess: Xianxia, the genre of this story, is FULL of rape.
Women are raped constantly. They're barely treated as human most of the time, usually only by the main character. Either a woman is stronger than everyone else in the area and thus safe, or a man comes along at her level of power and is always somehow stronger than her, beats her down and takes her. To that note, even the main character of a story can be a rapey bastard, using rape to show dominance, superiority, to break the strong-willed, to attack a man for revenge by raping his wife, to 'punish' a female rival or even companion. The threat of it is even far more common, like breathing. This is because Chinese society is backwards as all hell and women are viewed as NATURALLY inferior in all respects, and any woman with a position not 'fitting' for her is overreaching her station and thus a target to be mocked or abused. They also seem to not believe bisexuals or lesbians exist, and wish death to any gay male - which are all expressed more heavily and openly in their fiction-writing, to the point of appearing in practically the majority of the genre.
If you go to wuxia/xianxia communities and complain about it, or how ridiculous it is, you will be attacked by raving incels, downvoted into oblivion, and generally mocked by everyone.
So, can we at least STOP focusing on the fact Xueyun did this to the MC like it's the most unbelievable thing ever? He's not even bothered. He does not care. From the look of him he wishes he'd been awake for it but since he wasn't, 'oh-well, maybe next time.' It didn't even change him - yet the victims in most xianxia become 'good women' after being raped, traumatized into subservient obedience and silence.
The story is advancing, let's focus on that.