My elder sister sucks me on a train as a good bye

So I withdrew my cock out till only the head was in my Sis’s mouth and again pushed it in with a jerk. I went all the way in and touched her throat. That was inconvenient for her so she put her one hand on the base of my cock and took it in her fist, so that more than that point it could not move in her mouth. Perhaps she was drawing a limit for my lundforsucking , till a point it was easy and enjoyable for her.

About 4 inches of my cock was there in her mouth and about 3 – 3.5 inches was in her fist. She was also moving her fist on my cock and I was now openly moving my cock in and out of her mouth. In the meantime she kept her cheeks tight around my cock and kept her sucking motion. She used to put her tongue around the head of my cock and used to slurp it with the tip of it. She kept moving her tongue around my cock and kept caressing it with her tongue. She used to put the tip of her tongue on the opening of my lund( my pee point ) and kept scratching it with that. It was so enjoyable and good gesture of her. I was enjoying her sucking and also her moving of her tongue around the mushroom shaped head of my lund.

I was enjoying the first blowjob of my life. Now she brought her other hand near to my cock and put it under the testicles ( my balls). She started scratching underside of my balls with her long nails, but kept the pressure of nails so light that it was not only bearable but was most erotic and enjoyable. This added or rather multiplied me enjoyment many folds. I was enjoying the most erotic and enjoyable blowjob of my life. She was sucking it with full speed and pushing her cheeks inward she was making the sucking more intense so that it was most enjoyable. She kept moving her tongue around my cock and it kept giving me the spasms of sheer pleasure which I had never enjoyed before in my life.