His cock jumped at the sight… rubbing the head between her sloppy cuntlips for lubrication, he presses it against her stretched asshole and hisses i... pleasure as it pops right into her. The rest was smooth sailing… despite her cries and wiggling, there was nowhere to go, and it only took a couple of thrusts to be buried balls-deep in her insanely tight ass… the plug had only been about half his length, but wider at the base, so her insides accomodated him fairly quickly… he took one long moment. This is my first story so I may have made a few mistakes. Please give me feedback.My mom died when I was 7. So, my dad married this young chick when I was 16 years old. I’m 19 now and we still don’t like talking to each other. She has tried approaching me from time to time but I guess I was angry at her and didn’t like to talk much.This incident happened on a weekend which changed our lives. I was in the kitchen and had made a terrible mess preparing some food, and Jane (My Step-mom) arrived. One particular night everyone had gone to bed the van was dark my uncle asleep facing away from me my aunt asleep in front of me I woke up with a dim moonlight lighting up the van so I could see a little in the dim light. It was a warm night at some point I must have pushed the bed covers away as when I awoke I was laying there with no covers over me and as normal for a 13 year old I have a hard-on sticking through my boxers I didn’t think anything about as it was normal what I did notice was. She did not straighten it up either after closing the door. She needed to stop at the grocery store and pick up something to eat that night. As we drove mom opened up my glove box. I had forgotten about the girl’s bras and panties. Mom took them out and smiled as she looked them over.“These belong to your sister so I guess that these belong to Heidi then.” She said so matter of factly. Then she looked at the tags and said, “32-B they are both ready for a bigger size. I’m a 40-D just the same as.