chapter 1 cold to the bone

there are four timelines together(they live in peace on the surface.) underswap, underfell,swapfell and undertale timelines. by this story I about sans and grillby.
ok so hear.
it's a cold winter day and theres a massive blizzard and sans doesn't make it home freezing out In the cold . he makes it to grillbys the closest place in the snow storm. where he collapsed from exhaustion and hypothermia. he then saved by grillby and now sans had to wait for the storm to pass while spending his time with the most sexual monster in the timelines maybe not the most anyway how will this play out?