I’ve been rereading it’s worth it every time and that + the post abt mxy reminded me of how much I like your take on what happened! the way that… it’s not malicious on mxy’s part and at first he doesn’t even seem to realize how obvious he’s being, but he does eventually escalate to actual, unwelcome, come-ons towards jgy (the first scene when he checks on him and gives him heart eyes vs the “I’m yours” scene, is what I’m thinking here)
Thanks so much! I put a lot of thought into making MXY canon consistent, and I really wanted to capture how desperately vulnerable he is without minimising his behaviour. And off the back of this I've written an entire post about JGY and MXY exploring how JGY chooses to handle the MXY issue in canon, so here goes.
The relationship between JGY and MXY is a complicated one. JGY is the victim of MXY's inappropriate behaviour, but this isn't what could be considered a traditional perpetrator-victim dynamic. MXY is younger, less experienced, less powerful, and has at least one unspecified mental health condition. Even before JGY becomes clan leader, he has authority over MXY even if simply by virtue of being MXY's elder and quasi-mentor—and once JGY actually is clan leader, he literally has the power of life and death over MXY.
Before JGY is clan leader, he's in a much more awkward position because any harassment he receives from MXY either isn't going to be believed or no one is going to do anything about it. JGS isn't going to step in to protect JGY from the brother who is at Golden Carp Tower literally to reinforce how easily he can be replaced. It makes sense if JGY is, if not necessarily fending off open advances at this stage, then at least navigating treacherous waters. MXY is in awe of him and can't physically overpower him, but JGY is still forced to live with him.
Once JGY is clan leader, he has far more options. It's telling that he doesn't quietly dispose of MXY—which he could easily do. I'm actually going to digress and talk about JGY's many other illegitimate siblings for a moment, because I never really see them brought up and we know they are plentiful and many of them have perfectly respectable mothers. Like MXY, the very fact of their existence is absolutely a threat.
We get one extremely unreliable indication in the text that JGY might have killed off some of his other half-siblings. During the scene in which everyone turns on him and starts shouting baseless slander, one of the claims thrown out is that before he had his father killed he spent a couple of years quietly eliminating his various illegitimate and unacknowledged half-siblings. I don't for a moment think this is true or that we are intended to think this is true, considering other claims include JGY, a prostitute's son, only rising to power by sucking up to NMJ and LXC; and JGY deliberately orchestrating XXC's death for having the temerity to politely reject an invitation to join the Jin at a time when it was led by JGS.
So obviously this is nonsense. But, OK, it's not as though it's completely implausible that JGY might have wanted his half-siblings out of the way. He didn't intend for JZX to die but he certainly didn't hesitate to put him in danger. Let's take the least generous read possible and imagine that this demonstrably false gossip has a seed of truth: once he comes to power, JGY begins to quietly eliminate his other half-siblings to ensure no rivals emerge. We know JGY is ruthless. It makes sense that he'd be taking precautions.
But we also know JGY is not solely ruthless, and that he is also generous and loyal and repays his debts in his own fashion. Maybe he did bump off half-siblings out of fear that his enemies could rally behind one of them. But he doesn't have QS quietly killed, even though it would solve his incest problem, because he is so profoundly grateful that she treats him with respect and love and makes nothing of his background. And, more interestingly, he doesn't have MXY quietly killed either.
JGY is an efficient and capable man, but he has a habit of putting people who know just a little too much in out of the way places where he doesn't necessarily have to think about them but they remain as loose ends. I'm not necessarily saying my read is that JGY was definitely systematically killing off his siblings over the years, but I do think it's something he is in theory capable of (I support him), so the fact that MXY is kicked out without subsequently having a terrible and terribly convenient accident is notable. It's also consistent with his habit of not following through completely on eliminating risk of exposure (however small) if he feels affection and/or gratitude towards someone. See: NMJ, XY, QS, Sisi, etc.
I think it shows almost supernatural forbearance that MXY is deposited back at Mo Manor. He really could so easily have been killed. He knows about the Jin's experimentations in demonic cultivation, which makes him a liability, and has even seen WWX's notes. If JGY were really as ruthlessly pragmatic as so many in fandom seem to think, MXY would have died in a convenient accident not long after arriving back at Mo Manor. The only explanation is that JGY is genuinely fond of MXY, and in classic JGY fashion this means putting MXY in a miserable situation that's out of sight and out of mind so JGY can continue to flatter himself that he didn't kill him.