Don't be silly, Tongtong's mom is going to dashingly save her from falling and we'll start the mom yuri arc.
Nu-huh, she clearly fell. She's probably hurt. She'll need someone to help her with groceries and such, but her relationship with her daughter is quite strained. Who could possibly fill that role of being very close to her for a few weeks ?!
Discounting the generational trauma and the fact that Luxi's mom is actually homophobic, it's not simple to just "acccept" a gay daughter/son. [Rest omitted]
Stop. You don't need, you should not search for excuses or explanations of people being intolerant and homophobic. That behavior hurts people, hasn't a lick of moral grounds, and is not, in any way, justified. I saw dozens of people doing the same thing in the comments of Do You Like Tomboys on Webtoons (although that story, not just its commenters, also embraced that "he's not evil, just thinking of other people's reactions, he's a good person" angle, unlike here where Luxi's mom is not given excuse, the story just shows her reaction as an homophobic one). I'm surprised how common this kind of "but they have a reason" reaction is.
If I punch someone gratuitously, are you going to analyze the circumstances, my motivations, and present to others an explanation of why, even though you don't agree with it, I have my own reasons to assault someone ? I hope not. No one should explain away violence, because there is no possible explanation that would be valid for it. That is true whether that violence is physical or otherwise.
Don't spend your efforts to find excuses or explanations for people being homophobic. Hold them accountable instead.