[F] My Twin Sister Boyfriend had sex with me thinking I was my twin

So I have a identical twin sister the only difference between us is I have a bit of my hair dyed red and our personalties are a bit different. My twin has been going out with this guy for more than a year and things have been good with them, they are a good couple. For around a week my twin has been busy with stuff; she been busy working, helping people with stuff, studying, planning a party, and hanging out with friends. Since she has been so busy she had to cancel on her boyfriend multiple times and she felt bad. My sister likes to prank me and one day when our friends were over talking about the party we were planning, I was going to go to the bathroom (I was holding it in for a while so I didn’t miss anything important about the party but then I couldn’t hold it that much longer and headed towards the bathroom) but my sister stopped me and blocked the door and told me she only let me enter if I promise to go to see her boyfriend tomorrow and pretend to be her, and I didn’t want to go but I knew if I didn’t promise she wouldn’t let me enter the bathroom (based on her past pranks I knew she wasn’t bluffing) so I promised I would go meet him and pretend to be her, and I entered the bathroom and went potty. The day came when I had to meet him, so we meet up at a cafe. Before I arrived my sister told me about a couple stuff I should know so he doesn’t realize i’m not her. We talked in the cafe for a bit about different stuff and drank coffee and I apologized for cancelling so many times. We then went to his house and once we arrived he started acting more perverted touching my ass and groping my boobs, I liked it of course so I didn’t complain. He suggested I strip down and get more cozy so I took off all my clothes except for my bra and panties. We started watching tv or atleast I did, he put one hand in my panties and started fingering me and the other in the my bra and started playing with my boobs. He then took out his cock and asked me to help him out so I gave him a handjob for a bit and then put his cock in my mouth and gave it a bj and he spanked my ass and pushed my head down to get his cock deeper inside. He then took off my panties and bra and bent me over on the table infront of the couch and started fucking my pussy and cummed inside. We then cuddled up together and watched some tv and then I went back home and acted like nothing happened.

Source: reddit.com/r/gonewildstories/comments/hu89pp/f_my_twin_sister_boyfriend_had_sex_with_me