Unable to get some sleep because of how cold the room is, Ruby ends up asking her sister Yang if she could sleep next to her sister like when they were younger. Yang welcomes Ruby with open arms, however inside her mind the elder sister has other plans... (WARNING: Incest and smut) (Sorry for the bad summary. I stayed up for two days straight working on this story and refining it)

This is what happens when Marceline catches PB alone on a rainy day with nothing to do. One shot. Lots of yuri smutty/lemon-y goodness, so, keep that in mind before reading. Shippers of Sugarless Gum/Bubbline/or whatever else you may call it are welcome :)