Why did she go alone ?
She's been working in that dungeon for at least 100 days, she must know this place can be dangerous and unpredictable. She's expectantly waiting for the return of her lover. And she's a mother of two young children. She's shown to be otherwise level heaed and grounded. Why in the fuck would she decide to go alone ?
I mean, I get the meta reasonning for it, the author wants a dramatic reveal of her OP abilities, back-against-the-wall last resort shit… And characterisation because she's doing it to litterally save the children ! But that still doesn't explain the in-universe reason why she would do something so recklessly stupid.