| Vendrax |
Let's replace 'medusa' with 'human', 'elf', 'halfling' or 'elf'*. Is the immediate instinct to charge in and kill their progeny? Well, to anyone except those who have young children and are suffering from sleep deprivation and the need to get some angst from their system?**
As for the (oft repeated) argument 'but she's got a petrifying gaze' - you are seriously telling me you can't think of a number of ways to deal with that immediate problem? Then perhaps handing the creature over to a lawful authority (leaving her there after blinding to die of dehydration or starvation probably doesn't exactly qualify as 'good' either in my estimation).
Hmm, a lawful authority in the region. Does the monk belong to a monestery nearby? Is there a Cleric in the party with a church in the area? All legitimate options which fit a Law-type alignment.
* Dwarves deliberately not included. All stunties are evil***
** Yes, a deliberately flippant comment. Apologies to all the sleep deprived mums and dads out there who don't feel the need to kill (yet)
*** Yes, I'm a speciesist.