My sister found her bikini pics in my phone

Yesterday my sister (f26) and her boyfriend (m30) spent the evening at our parents’s place. I (m23) also ended up visiting them. We don’t really see each other with my sis lately, but I have to admit I jerk off to her a lot. Just for the record I would never try anything with her irl, but she is so fucking hot, everybody would do the same in this position. She doesn’t really post bikini stuff, only yogapants level, but last weekend they were at some lake or something and she posted 2 bikini pics, one from the front, one from behind.

The poses are perfect, the bikini is so hot. Covers nothing of her juicy ass. I took screenshots immediately. I jerked off to the pics but I totally forgot about them after.

Yesterday she grabbed my phone from my hand for I dont even know why. She was laughing and saying I definitely has one of the funny photos she was talkin about with my mom. I couldn’t even lock it. I froze. I literally saw the shock on her face as she opened my camera roll. She stopped laughing and got so embarassed. She put down my phone I felt so embarassed too I just fuckin left the living room. I was waiting for them to leave before I come out from my old room. I heard my mom trying to figure out what happened. Nobody could really understand the situation. I told them I feel sick, but they also made up a reason to leave. Her boyfriend was so confused too.

I feel so fucking bad, I feel like I can’t look her in the eyes after this, but it also turned me on even more and I can’t stop having fantasies about her.