After that first day I was on cloud nine. I started seeing my sis in an entirely new light. We now had a chemistry between us and would exchange meaningful glances. Although we were quite physical my sis still did not allow me to fuck her in the proper sense that she still refused penetration. However hard I tried she made one or the other excuse and got away. Mean while on her birthday I presented her with a sheer black negligee which cost me a fortune as it was bought off my pocket money, savings. I requested her to show herself off in the negligee. At first she showed her usual girlish coquetry but at last agreed. She asked me to come to her bedroom after everyone was asleep.
I was prepared, I got myself a pack of condoms and waited in anticipation as I knew today was the day. As the day progressed we were busy preparing for the party thrown for her b'day. After the party which was a drag for me we all progressed to our rooms. The house was soon plunged in silence and no sound was to be heard except the whirring of my air-conditioner. I waited long enough to ensure that my parents were asleep and then tiptoed to my sis' bed room with the condom pack in my pocket.
I reached her door and gave it a slight push. The door opened noiselessly. I was disappointed, my sis was wearing a full length robe and not the negligee she had promised. I looked at her accusingly. She only smiled and came to me and kissed me fully on my lips. She then slowly and sensuously discarded her robes. Inside she revealed her self to me in that sheer negligee. It looked exquisite on her milky white complexion. Her boobs were magnificent having grown to size 34c from 32b in the last couple of months. She had a flat navel and a deep belly button which was visible underneath that negligee. God I went bananas, I just could not control myself and started kissing her violently. when we broke our kiss we were both panting for air.