Malvaviscomars2 Rule 34 rule 34 after sex balloons bed bedroom birthday birthday sex black sweater black tentacles blush color sans dreamtale undertale fanfiction fan character happy birthday heart in bed er sans er sans fan character knife looking at viewer malvaviscomars2 nightmare sans nightmare sans fan character pillow red blush sans au sans oc skeleton sweat sweating tentacle undertale white pillow 6069241