Lust or Love: Sans x (older) Frisk

Frisk has been in the underground for a few years now, she (yes I made Frisk a she if you don't like it don't read it) is about 17, her age will change through out. Sans is in his 20's. Frisk is a bit frisky in this story...but not just with Sans. This will contain adult themes and language. Enjoy it you filthy sinner...