Not Enough People Draw Gaster And Alphys Interacting - Tumblr Posts

Yanno how when you were a kid you would sometimes slip up and call the teacher mom? Well Alphys is so used to hearing sans and Papyrus calling Gaster dad all day that one day she slips up and calls him that. He turns to her like “OH ALPHYS I DIDNT KNOW YOU SAW ME THAT WAY :-)” she is embarrassed about it for weeks after. sans wouldn’t let her live it down either, making jokes and teasing her about how that would technically make them siblings.

(ft. Richard because i love him. also the rare and elusive wearing a labcoat. Also he is completely genuine. Also again alphys never tells a single soul what happened but Richard eagerly tells his family over dinner. sans takes this and runs with it)