NightChaosCat asked: Wait... You said you'll erase all of them... So why should only Sans look out? If you dare hurt one of them you'll burn in hell too! Thats a promise!

2) Suuuure the Au they are in is perfectly safe

2nd one is answered below

1st one answered below

If you didn't read the last chapter, I recommend you do that. Also yes that is AT! Toriel