After events of Undertale.... You came back to Snowdin, or to be specific Snow Forest and see sentry station it was empty... As you walk around, feeling somewhat happy and nostalgic... As you notice a Sans as he turns around to look at you, his expression was happy as he offers you with hotdog and ketchup on other hand as his grin widens

Sans: Hey kid, do you wanna weiner in your mouth?

As you accept, he hands you hotdog and you ate it fully, as he drinks ketchup fully and suddenly he hugs you tightly, his hug was more of a bear-hug as he squeezes you tightly with affection