Got caught by GF's sister..KNN

My GF shares the same room as her younger sister. So sometimes I will be in the room alone with my GF and her sister will be watching TV in the hall. That is what happened today. Just now, my GF say weather very hot so she go shower. I was alone in the room. I noticed my GF's sister bra that was hanging on those mobile hangers dropped on the floor. So I picked it up and out of curosity wanted to check out her bust size since she sometimes show me half ball.

KNN.. when I was looking at the tag on the bra, my GF's sister opened the door. I looked at her shocked and she also stunned as wtf are u doing with my bra. Then she smiled and took the bra from me... knn... and she purposely brush her TNN (34C) on my arm. Then she smiled at me, hang back her bra and left the room...

KNN.. the look was like CFM.. after that my GF sister left for her work. She work shift cos she is a nurse. My GF came out from shower and I damn dak boleh tahan so I piak piak her and kept thinking of her sister.... my GF still tell me that today piak feels different cos was very rough... but I feel damn song...