@Simpleton
She is already very short so 50 might not be ideal. We should adjust her weight in accordance to her build and height. Not overall averages.
I don't remember how tall she is in the wn but if memory serves she never goes beyond 154cm so she should, if we go in accordance to body volume, she should stay a bit under 50, even with increased muscle mass? Something around 46 I guess?
Lower than that might be inadvisable unless she loses a lot of her muscle mass without getting fat again (which is pretty much impossible for her)