After his session with his mother last time, he swore to become even stronger than her and the dominant one in the relationship. He was now starting to do things a bit more shamelessly to adjust to that goal and test out new things and his true self. He didn't know what his true personality was but doing what he liked was one way to find it. Thus here he was, asking his big sister to say vulgar words which she hadn't said in her whole life.
"N-no. I am not saying that. I am not shameless like you or mom. Hmph!" Lucy said in an embarrassment way and turned her face sidewards to not look at him. Although she said that, her body did the complete opposite. Her hips started shaking and moving more towards Lith's dick as if wanting to let it inside on it's own.
"Big sis, you should be honest like your body. Now tell me what you want and your little brother would definitely fulfill it for you." Lith said shamelessly.
After a few seconds of contemplating.
