Scenario 1:
You  had traveled to hotland to see mettaton but on the way were accompanied by a small skeleton named swap sans

Scenario 2:
You were hanging out with swap papyrus or as you call him paps he asks you if you wanted to meet his brother you agreed and walked inside the house as soon as you did you heard a strange noise from the kitchen it was a little skeleton baking muffins and cooking tacos happily