so let me get this straight (lmao).
Meguru asked her girlfriend, who was clearly into her, for sex - Then got upset when she said yes, failing her hidden 'test'.
Girl has issues, but intentionally triggering a trauma as a 'test' isn't healthy or fair because it causes exactly the kind of secondary trauma Azuki now has. God damn.
In a perfect world, Meguru would just communicate "I have sexual trauma and am not comfortable with sex", but teenagers gonna teenager (Although I've seen worse communication from working adults so lmao I guess).

While correct in your analysis, I think Meguru was just trying to process her father's infidelity. She wanted Azuki to save and reassure her, someone who wouldn't betray her expectations; this obviously backfired, but I think it's good to see that it was just her lashing out because of the trauma.

Anyway, the only one I'm actually worried about is Niji, that girl is clearly dangerous, just imagine what would happen if she witnessed this scene.

I'm honestly most terrified of Niji as well, she gives me serious Mirai Nikki Yuno vibes. shivers