A while later we had became nude and she furiously started sucking my dick. She even bit it.Aaaahhhhh randi saali kaatti kyu hai Kaminiiiii ahahahhaha... chusss kuttiiiiii these words energised her and she increased her speed and I soon cummed. She drank it all and then mockingly said “hahahhaa itna jaldi jhad gayaa bhadva tere se to mere bete ka lund bada hai chutiya.This angered me like hell. I turned her around and made her lie in doggy position. I then slapped her ass without mercy. Ahahaha. Not to say I didn't get turned, on every night we had one.The next 'lesson', was a day or two later. All the circumstances were about the same, except that I had a lot more confidence, not only in the 'lessons', but in myself too. The other exception was, that Mom was wearing a lace, shorty night-gown, complete with panties. This evening started out like the other recent ones had, with me kissing and licking and sucking her upper body. I liked concentrating on her tits, and she was enjoying it. Those nights blurred together, numbing me to the late night chaos that was sure to come home whenever Garret said, “Going out with the boys tonight.” I appreciated the gesture, and knew it was his way of apologizing for any inconvenience. At least they did not try and bring me into the crazy mix of sex and alcohol. Admittedly, I often watched and, drifted off to sleep wondering what it would be like. Just a passing thought with my own pragmatism bringing me back to Earth. I did not want to. We were enjoying of college and hostel life. Initial day’s seniors had not madeany problem. But, after 2 weeks, seniors started teasing us. Earlier theragging was tolerable, like they used to force us to do dance or we had to washtheir clothes, etc. It continued for few days. I won’t forget that day, whenfew of my seniors came to our room after dinner. They asked us we have to calculateEjaculation Factor of each other. We did not know that term.We asked them about it. One of them told, we have.