After dinner and some drinks we started to throw around plans for making her the Queen. Killing 100 people is no small thing. You would have to do it nearly simultaneously and there is no room for error; if one gets away the plan is sunk.
After a bit more discussion we decided it wasn't as bad as all that. For instance If the SLF died of a heart attack no one would suspect it was an attack on the crown. Working backwards from there we decided (around this point the SLF was regretting mentioning it altogether) the plan would be to start small and work upwards. No one would start connecting the dots until the top-20 started to drop dead of heart attacks and only then if they were in their teenage years (seriously, have you ever seen a tabloid about Dutch royalty? no one cares).
Even assuming everything went to plan you still need to cover your tracks. If 99 would-be royals die some suspicion will fall on Ms 100. To cover your tracks at least half of the next fifty would need to go as well.
At the end a successful conspiracy would require the death of hundreds and the participation of hundreds more. It is safe to say the SLF will remain a school teacher and it is hoped she won't mention her pedigree over any beer soon.
(this conversation was only ten minutes of our night but the rest was largely inside joke stuff and even less interesting).
[1] It sucks to be Pete during high holidays. Is she marriable? Are you going to marry her? My family is ambivalent until the last yard.