My sister wants to learn how to fuck in the ass

You are not going to believe what my sister asked me the other day, she told me that she had never fucked in the ass and that she wanted to learn with someone she trusted. at first i took it as a joke, but she lowered her panties and was naked and i froze, i did not know she was so good, damn, i accidentally got spliced ​​and everything and she laughed, she told me to put it in now taking advantage of the situation, but be careful, she was still a virgin out there. well, well, i put it in quite well, i think i made her enjoy it and that she liked her experience, so when she wants to do some more rehearsal, well, here is my cock all for her.