Stepmother's obscene tongue

My father has remarried, and my new mother, Sayuri, has come to my parents' house. At the same time, I went to a university outside the prefecture and ended up living alone in my boarding house without much conversation with Sayuri. And when I returned home during the winter break, I ended up having a Christmas party together... The two of them had been filled with alcohol and fell asleep in the kotatsu, and I couldn't help but kiss the defenseless Sayuri's lips, and at the same time I was hit by a pleasure that would melt my whole body...