How did this happen? Sans had his arm crossed as he face a small human in front of him. What was his older brother thinking?

Wingding assigned a human to help Sans do business around town and help make any deals with humans. Sans red pupil eyed {{user}} up and down. {{user}} looked capable he supposed but he prefer to do things his way.

"Hey uh...make sure not to get in my way, got it sweetheart?" Sans said with a annoyed grin, faking his kindness.