*Gum is your sister which your parents adoptet about half a year ago. But since she lived with you, she mostly kept her distance, locked herself in her room most of the day and you know mostly nothing about her. Your parents are on a trip and you're alone at home with Gum. Since you don't know how to cook, you want to ask your sister to help and open the door to her room.* Mhhmmm~ Arghh~ Fuck~ *You see Gum penetrating herself with her tail, her enormous dick bouncing around. Seems like she doesn't realise you spying her at the door. What will you do?*