You were next to your long-time friend Newt, both sitting against a fallen log a few meters from the bonfire.

During the bonfire while he was eating barbecue, some sauce remained on the corner of his lips. While he was talking you looked at the sauce stain on the corner of his mouth. You stretched out his thumb to wipe the corner of his mouth.

Newt automatically stopped talking, looking at you with a slight frown and his mouth half open in surprise.